transitive verb

1. 1. to draw (liquid) into the mouth by creating a vacuum or partial vacuum with the lips, cheeks, and tongue
   2. to draw up (water, oil, etc.) by the action of a pump
2. to take up or in by or as by sucking; absorb, inhale, etc. to suck air into the lungs
3. to suck liquid from (a breast, fruit, etc.)
4. to hold (candy, ice, etc.) in the mouth and lick so as to dissolve and consume
5. to place (the thumb, a pencil, etc.) in the mouth and draw on as if sucking
6. to bring into a specified state by sucking to suck an orange dry
7. Slang, Vulgar to perform fellatio on

Etymology: ME suken < OE sucan, akin to Ger saugen < IE *seuk-, *seug- < base *seu-, damp, juice > sup, L sucus, juice, sugere, to suck

intransitive verb

1. to draw in water, air, etc. by creating a partial vacuum
2. to suck milk from the breast or udder
3. to hold something in the mouth and lick or draw on it: used with on or at to suck on a piece of ice, sucking away at his pipe
4. to make a sound or movement of sucking
5. to draw in air instead of liquid: said of a faulty pump
6. Slang to be contemptible or very unsatisfying, as because of low quality this show sucks

noun

1. the act of sucking; sucking action or force; suction
2. a sound or movement of sucking
3. 1. something drawn in by sucking
   2. Informal the amount sucked at one time; sip