(archaic) Still nourished by the mother's milk, as an infant; suckling. / (archaic, by extension, figuratively) Young and inexperienced.

(transitive) To cause (someone) to become slowly more and more involved in some business or situation that may not be to their advantage. / (transitive) To draw inward.

To cause someone to become slowly more and more involved in a business or situation that is often not to that person's liking.

(idiomatic, vulgar) a rebuke or dismissal

simple past tense and past participle of suck in

present participle of suck in

Third-person singular simple present indicative form of suck in

(idiomatic, chiefly US, vulgar) Used to express contempt after a victory, a refuted argument or the sharing of undesirable information.

(transitive) To absorb (fluid). / (slang, chiefly with "to") To adulate or flatter somebody excessively, generally to obtain some personal benefit or favour. / To fellate (a person)

(colloquial, vulgar) Term of general disparagement, an emphatic version of suck/sucks