(slang, vulgar, derogatory) a contemptible person

(archaic) To suckle; to give milk from the breast (to).

Alternative form of suck ass

(idiomatic, UK) To be in a sour or negative mood.

Alternative form of suck a lemon

Used other than figuratively or idiomatically: see suck, out.

(poker slang) An instance of winning a hand by sucking out.

simple past tense and past participle of suck up

present participle of suck up

(slang, chiefly LGBT) Someone who has a particular enjoyment of or skill for fellatio.