suck (Verb) — Draw into the mouth by creating a practical vacuum in the mouth. ex. "suck the poison from the place where the snake bit" ex. "suck on a straw" ex. "the baby sucked on the mother's breast"
suck (Verb) — Draw something in by or as if by a vacuum. ex. "Mud was sucking at her feet"
suck (Verb) — Attract by using an inexorable force, inducement, etc.. ex. "The current boom in the economy sucked many workers in from abroad"
suck (Verb) — Be inadequate or objectionable. ex. "this sucks!"
suck (Verb) — Provide sexual gratification through oral stimulation.
suck (Verb) — Take in, also metaphorically. ex. "The sponge sucks water well"
suck (Verb) — (of a woman) produce breast milk for a baby to drink.
suck (Noun) — The act of sucking.