suck in

Collins Concise English Dictionary © HarperCollins Publishers::

suck in verb (adverb)

1. (transitive) to attract by using an inexorable force, inducement, etc
2. to draw in (one's breath) sharply

WordReference Random House Learner's Dictionary of American English © 2025

suck /sʌk/   v. 

1. to draw into the mouth by producing a partial vacuum by action of the lips and tongue: [~ + object]
   to suck lemonade through a straw.
   [no object]
   The baby was sucking at his mother's breast.
2. to draw (water, air, etc.) by or as if by suction:
   [~ + object] Plants suck moisture from the air.
3. to apply the lips or mouth to and draw the liquid from: [~ + object]
   to suck an orange.
   [no object]
   to suck at an orange.
4. to put into the mouth and draw upon: [~ + object]
   to suck a piece of candy.
   [no object]
   sucking on a cough drop.
5. Slang Terms to be disgusting or awful:
   [no object* not: be + ~-ing] That team sucks; it can't win any of its games.
6. Slang Terms suck up, [no object* (~ + to + object)] to be subservient;
   to be obsequious:
   He's sucking up to the boss because he thinks he'll get a promotion that way.

n. [countable]

7. an act or instance of sucking.

WordReference Random House Unabridged Dictionary of American English © 2025

suck  (suk), v.t. 

1. to draw into the mouth by producing a partial vacuum by action of the lips and tongue:
   to suck lemonade through a straw.
2. to draw (water, moisture, air, etc.) by or as if by suction:
   Plants suck moisture from the earth. The pump sucked water from the basement.
3. to apply the lips or mouth to and draw upon by producing a partial vacuum, esp. for extracting fluid contents:
   to suck an orange.
4. to put into the mouth and draw upon:
   to suck one's thumb.
5. to take into the mouth and dissolve by the action of the tongue, saliva, etc.:
   to suck a piece of candy.
6. to render or bring to a specified condition by or as if by sucking.

v.i. 

7. to draw something in by producing a partial vacuum in the mouth, esp. to draw milk from the breast.
8. to draw or be drawn by or as if by suction.
9. Hydraulics (of a pump) to draw air instead of water, as when the water is low or a valve is defective.
10. Slang Terms to behave in a fawning manner (usually fol. by around).
11. Slang Terms to be repellent or disgusting:
    Poverty sucks.
12. suck face, to engage in soul-kissing.
13. Slang Terms suck in, to deceive;
    cheat;
    defraud:
    The confidence man sucked us all in.
14. Slang Terms suck off, Slang (vulgar). to fellate.
15. Slang Terms suck up, to be obsequious;
    toady:
    The workers are all sucking up to him because he's the one who decides who'll get the bonuses.

n. 

16. an act or instance of sucking.
17. a sucking force.
18. the sound produced by sucking.
19. that which is sucked;
    nourishment drawn from the breast.
20. a small drink;
    sip.
21. a whirlpool.

• bef. 900; (verb, verbal) Middle English souken, Old English sūcan, cognate with Latin sūgere; (noun, nominal) Middle English souke act of suckling, derivative of the noun, nominal; akin to soak

suck′less, adj.