you said it

English

Used to express complete agreement with a previous statement by the interlocutor.
Synonyms: tell me about it; amen

Coordinate terms: you're telling me; I know, right; IKR
Used to emphasize that a wording or a turn of phrase was chosen by the interlocutor, not by the speaker.
Coordinate terms: if you will; if you say so

A: I kept giving him the benefit of the doubt, but now where have we arrived at? Call a spade a spade: he's a liar! B: You said it — I didn't.