To suck is to draw something by force. Vacuum cleaners suck dirt from the floor and milkshake drinkers suck this liquid, tasty liquid through a straw.

Drinking something by pulling it into your mouth is to suck it. You can also suck on something, like a peppermint or a thumb, by holding it in your mouth. Objects can suck too — a fan sucks warm air out the window. You can also suck someone into your plans, meaning you force them to participate. The word suck comes from the Proto-Indo-European sug, from the sound your mouth makes when you suck on something.

Definitions of suck
  1. verb
    draw into the mouth by creating a practical vacuum in the mouth
    suck the poison from the place where the snake bit”
    suck on a straw”
    “the baby sucked on the mother's breast”
    breastfeed, give suck, lactate, nurse, suckle, wet-nurse
    give suck to
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    type of:
    drink, imbibe
    take in liquids
  2. verb
    draw something in by or as if by a vacuum
    “Mud was sucking at her feet”
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    type of:
    draw, take out
    take liquid out of a container or well
  3. verb
    attract by using an inexorable force, inducement, etc.
    “The current boom in the economy sucked many workers in from abroad”
    synonyms: suck in
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    type of:
    absorb, take in
    suck or take up or in
  4. verb
    take in, also metaphorically
    synonyms: absorb, draw, imbibe, soak up, sop up, suck up, take in, take up
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    mop, mop up, wipe up
    to wash or wipe with or as if with a mop
    dry (ink) with blotting paper
    sponge up
    absorb as if with a sponge
    swab, swob
    wash with a swab or a mop
    soak up with a sponge
  5. verb
    provide sexual gratification through oral stimulation
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    type of:
    excite, stimulate, stir
    stir feelings in
  6. verb
    give suck to
    synonyms: breastfeed, give suck, lactate, nurse, suckle, wet-nurse
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    feed (infants) with a bottle
    type of:
    feed, give
    give food to
  7. verb
    be inadequate or objectionable
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    type of:
    have the quality of being; (copula, used with an adjective or a predicate noun)
  8. noun
    the act of sucking
    synonyms: sucking, suction
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    type of:
    consumption, ingestion, intake, uptake
    the process of taking food into the body through the mouth (as by eating)
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