When you slip, you slide or skid unintentionally. A slip is also a kind of underwear you wear under a skirt. A Freudian slip, on the other hand, is a slip of the tongue.

You can slip on a damp or icy surface, and you can also slip by making a mistake or getting worse, as in "If the company doesn't sell more candy, their profits will slip." It also means "move in a sneaky or quiet way," so you might slip out of a birthday party before cake is served. As a noun, a slip can be a mistake, a fall, a piece of something (especially paper), or a skirt-like type of underwear.

Primary Meanings of slip

move obliquely or sideways, usually in an uncontrolled manner
an accidental misstep threatening (or causing) a fall
move easily
the act of avoiding capture (especially by cunning)
a part (sometimes a root or leaf or bud) removed from a plant to propagate a new plant through rooting or grafting
a small sheet of paper
potter's clay that is thinned and used for coating or decorating ceramics
Full Definitions of slip

v move obliquely or sideways, usually in an uncontrolled manner

skid, slew, slide, slue
move forward or under in a sliding motion
slide without control
slide sideways through the air in a downward direction in an airplane along an inclined lateral axis
Type of:
move smoothly and effortlessly

v move out of position

dislocate, luxate, splay
Type of:
displace, move
cause to move or shift into a new position or place, both in a concrete and in an abstract sense

v get worse

“My grades are slipping
drop away, drop off, fall away
backslide, lapse
drop to a lower level, as in one's morals or standards
Type of:
decline, worsen
grow worse

v to make a mistake or be incorrect

err, mistake
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remember incorrectly
slip up, stumble, trip up
make an error
judge incorrectly
fall for
be deceived, duped, or entrapped by
underestimate, underrate
make too low an estimate of
overestimate, overrate
make too high an estimate of
miscalculate, misestimate
judge incorrectly

n an accidental misstep threatening (or causing) a fall

“he blamed his slip on the ice”
“the jolt caused many slips and a few spills”
fall, spill, tumble
a sudden drop from an upright position
a fall onto your buttocks
a spill in some sport (as a fall from a bicycle or while skiing or being capsized on a surfboard)
Type of:
misadventure, mischance, mishap
an instance of misfortune

n an unexpected slide

sideslip, skid
Type of:
coast, glide, slide
the act of moving smoothly along a surface while remaining in contact with it

n a minor inadvertent mistake usually observed in speech or writing or in small accidents or memory lapses etc.

miscue, parapraxis, slip-up
Freudian slip
a slip-up that (according to Sigmund Freud) results from the operation of unconscious wishes or conflicts and can reveal unconscious processes in normal healthy individuals
Type of:
error, fault, mistake
a wrong action attributable to bad judgment or ignorance or inattention

n a socially awkward or tactless act

faux pas, gaffe, gaucherie, solecism
Type of:
bloomer, blooper, blunder, boo-boo, botch, bungle, flub, foul-up, pratfall
an embarrassing mistake

n a flight maneuver; aircraft slides sideways in the air

Type of:
airplane maneuver, flight maneuver
a maneuver executed by an aircraft

v move easily

slip into something comfortable”
Type of:
move so as to change position, perform a nontranslational motion

v move smoothly and easily

“the bolt slipped into place”
“water slipped from the polished marble”
Type of:
break loose, escape, get away
run away from confinement

v cause to move with a smooth or sliding motion

“he slipped the bolt into place”
Type of:
displace, move
cause to move or shift into a new position or place, both in a concrete and in an abstract sense

v move stealthily

“The ship slipped away in the darkness”
Type of:
move so as to change position, perform a nontranslational motion

v pass on stealthily

“He slipped me the key when nobody was looking”
Type of:
give, hand, pass, pass on, reach, turn over
place into the hands or custody of

v insert inconspicuously or quickly or quietly

“He slipped some money into the waiter's hand”
Type of:
enclose, inclose, insert, introduce, put in, stick in

v pass out of one's memory

slip one's mind
Type of:
blank out, block, draw a blank, forget
be unable to remember

n the act of avoiding capture (especially by cunning)

eluding, elusion
Type of:
the act of physically escaping from something (an opponent or a pursuer or an unpleasant situation) by some adroit maneuver

n bed linen consisting of a cover for a pillow

case, pillow slip, pillowcase
Type of:
bed linen
linen or cotton articles for a bed (as sheets and pillowcases)

n a woman's sleeveless undergarment

chemise, shift, shimmy, teddy
Type of:
undergarment, unmentionable
a garment worn under other garments

n a place where a craft can be made fast

berth, moorage, mooring
Type of:
anchorage, anchorage ground
place for vessels to anchor

n a slippery smoothness

slick, slickness, slipperiness
Type of:
a texture without roughness; smooth to the touch

n a part (sometimes a root or leaf or bud) removed from a plant to propagate a new plant through rooting or grafting

cuttings of plants set in the ground to grow as hawthorn for hedges or vines
Type of:
stalk, stem
a slender or elongated structure that supports a plant or fungus or a plant part or plant organ

n a young and slender person

“he's a mere slip of a lad”
Type of:
spring chicken, young person, younker, youth
a young person (especially a young man or boy)

n a small sheet of paper

“a receipt slip
slip of paper
Type of:
piece of paper, sheet, sheet of paper
paper used for writing or printing

n artifact consisting of a narrow flat piece of material

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a thin flat strip of flexible material that is worn around the body or one of the limbs (especially to decorate the body)
band, ring
a strip of material attached to the leg of a bird to identify it (as in studies of bird migration)
a thin flat strip or loop of flexible material that goes around or over something else, typically to hold it together or as a decoration
cramp, cramp iron
a strip of metal with ends bent at right angles; used to hold masonry together
one of several strips across a sail that can be taken in or rolled up to lessen the area of the sail that is exposed to the wind
lead, leading
thin strip of metal used to separate lines of type in printing
a nonstructural vertical strip between the casements or panes of a window (or the panels of a screen)
ribbon, typewriter ribbon
a long strip of inked material for making characters on paper with a typewriter
an accurately levelled strip of material placed on a wall or floor as guide for the even application of plaster or concrete
a thin strip of metal or bone that is used to stiffen a garment (e.g. a corset)
a short strip of material attached to or projecting from something in order to facilitate opening or identifying or handling it
a long thin piece of cloth or paper as used for binding or fastening
weather strip, weather stripping, weatherstrip, weatherstripping
a narrow strip of material to cover the joint of a door or window to exclude the cold
adhesive tape
tape coated with adhesive
a band worn around the upper arm
arm band, armlet
a band worn around the arm for decoration
a broad band that passes over the back of a horse and supports the shafts of a vehicle
a cloth band that is worn around the waist (as on infants until the navel has healed)
collar, neckband
a band that fits around the neck and is usually folded over
a band of leather or rope that is placed around an animal's neck as a harness or to identify it
garter, supporter
a band (usually elastic) worn around the leg to hold up a stocking (or around the arm to hold up a sleeve)
cincture, girdle, sash, waistband, waistcloth
a band of material around the waist that strengthens a skirt or trousers
a band worn around or over the head
headpiece, headstall
the band that is the part of a bridle that fits around a horse's head
hoop, ring
a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling
a linen tape used for trimming as a decoration
elastic, elastic band, rubber band
a narrow band of elastic rubber used to hold things (such as papers) together
shoulder strap, strap
a band that goes over the shoulder and supports a garment or bag
a band of fabric or leather sewn inside the crown of a hat
a band of material tied around the forehead or wrist to absorb sweat
bracelet, watch bracelet, watchband, watchstrap, wristband
a band of cloth or leather or metal links attached to a wristwatch and wrapped around the wrist
a narrow closely woven tape; used in upholstery or for seat belts
mourning band, weed
a black band worn by a man (on the arm or hat) as a sign of mourning
band consisting of a part of a sleeve that covers the wrist
wrist band, wristlet
a band or bracelet worn around the wrist
Type of:
artefact, artifact
a man-made object taken as a whole

n potter's clay that is thinned and used for coating or decorating ceramics

Type of:
potter's clay, potter's earth
clay that does not contain any iron; used in making pottery or for modeling

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