(idiomatic) To reply impertinently or rudely; to answer in a cheeky or rude manner. / (idiomatic) To return disrespect.

(transitive) To use clever talk in order to persuade someone to do something rash.

To flatter. / To persuade using flattery.

A manner of talking to someone in a pleasing or funny way in order to persuade them to do or believe something.

(slang, vulgar) To untruthfully speak of another in a belittling, deprecative, slighting manner, either in person or in absentia. / (slang, vulgar) To speak nonsense or to lie.

(slang) To untruthfully speak of another in a belittling, deprecative, slighting manner, either in person or in absentia.

simple past tense and past participle of trash-talk

(Singapore, Malaysia, informal) To talk nonsense. / (Singapore, informal) To engage in idle chatter.

(idiomatic) To negotiate a lower price. / (flying) Of ground control: to verbally assist someone to land an aircraft.

(idiomatic) To argue a point by repetition of the same theme, sometimes by using different words, but without making any progress.