Your bum is your bottom, your rear-end, your behind. It can also be a vagrant or hobo, as well as a verb for lazing (bumming) around.

Bum is a name given to a beggar or homeless person: someone who tries to bum change from you. You don't have to be a bum to hum a cigarette from someone. Also, bum is a general insult, as in "The Yankees are bums!" A false accusation is a bum rap. If you remember that your bum is your butt — where you sit when you're being lazy — then the different meanings should fit together well.

Primary Meanings of bum

a disreputable vagrant
be lazy or idle
of very poor quality; flimsy
the fleshy part of the human body that you sit on
Full Definitions of bum

n a disreputable vagrant

“he tried to help the really down-and-out bums
hobo, tramp
dosser, street person
someone who sleeps in any convenient place
Type of:
drifter, floater, vagabond, vagrant
a wanderer who has no established residence or visible means of support

n person who does no work

“a lazy bum
do-nothing, idler, layabout, loafer
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clock watcher
a worker preoccupied with the arrival of quitting time
couch potato
an idler who spends much time on a couch (usually watching television)
dallier, dilly-dallier, dillydallier, lounger, mope
someone who wastes time
dawdler, drone, laggard, lagger, poke, trailer
someone who takes more time than necessary; someone who lags behind
daydreamer, woolgatherer
someone who indulges in idle or absentminded daydreaming
goldbrick, good-for-naught, good-for-nothing, goof-off, ne'er-do-well, no-account
an idle worthless person
a lazy person
lie-abed, slugabed
a person who stays in bed until a relatively late hour
a worthless lazy fellow
shirker, slacker
a person who shirks his work or duty (especially one who tries to evade military service in wartime)
slug, sluggard
an idle slothful person
a person without employment who makes money by various dubious schemes; goes about smartly dressed and having a good time
someone who basks in the sunshine in order to get a suntan
one who behaves lightly or not seriously
someone who whittles (usually as an idle pastime)
lotus-eater, stargazer
someone indifferent to the busy world
dreamer, escapist, wishful thinker
a person who escapes into a world of fantasy
a soldier who performs his duties without proper care or effort
lingerer, loiterer
someone who lingers aimlessly in or about a place
malingerer, shammer, skulker
someone shirking their duty by feigning illness or incapacity
plodder, slowcoach, slowpoke, stick-in-the-mud
someone who moves slowly
potterer, putterer
a person who putters about
a shirker
straggler, strayer
someone who strays or falls behind
Type of:
a person who does nothing

n a person who is deemed to be despicable or contemptible

“throw the bum out”
crumb, dirty dog, git, lowlife, puke, rat, rotter, skunk, so-and-so, stinker, stinkpot
Type of:
disagreeable person, unpleasant person
a person who is not pleasant or agreeable

v be lazy or idle

“Her son is just bumming around all day”
bum about, bum around, frig around, loaf, loll, loll around, lounge about, lounge around, waste one's time
Type of:
idle, laze, slug, stagnate
be idle; exist in a changeless situation

v ask for and get free; be a parasite

cadge, grub, mooch, sponge
live off somebody's generosity
Type of:
come into possession of

adj of very poor quality; flimsy

cheap, cheesy, chintzy, crummy, punk, sleazy, tinny
of low or inferior quality

n the fleshy part of the human body that you sit on

ass, backside, behind, bottom, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush
Type of:
body part
any part of an organism such as an organ or extremity

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