| 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. |
| 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. | (of a pump) to draw air instead of water, as when the water is low or a valve is defective. |
| 10. | Slang. to behave in a fawning manner (usually fol. by around). |
| 11. | Slang. to be repellent or disgusting: Poverty sucks. |
| 12. | an act or instance of sucking. |
| 13. | a sucking force. |
| 14. | the sound produced by sucking. |
| 15. | that which is sucked; nourishment drawn from the breast. |
| 16. | a small drink; sip. |
| 17. | a whirlpool. |
| 18. | suck in, Slang. to deceive; cheat; defraud: The confidence man sucked us all in. |
| 19. | suck off, Slang: Vulgar. to fellate. |
| 20. | suck up, Slang. to be obsequious; toady: The workers are all sucking up to him because he's the one who decides who'll get the bonuses. |
| 21. | suck face, to engage in soul-kissing. |

suck
|
sucking
drawing of fluids into the mouth by creating a vacuum pressure in the oral cavity. Mammalian infants rely on this method of food ingestion until they are capable of eating more solid substances. A partial vacuum is created in the oral cavity by retracting the tongue to the back of the mouth. The rear portion of the tongue seals against the roof of the mouth, allowing liquids to be drawn into the front region. When the oral cavity is full, the tongue relaxes, and fluids flow back to the throat to be swallowed.
Learn more about sucking with a free trial on Britannica.com.