Английский словарь американских идиом - say one's peace

or speak one's piece {v. phr.} To say openly what you think; say, especially in public, what you usually say or are expected to say. * /John told the boss that he thought he was wrong and the boss got angry. He said, "You've said your little piece, so go on home."/ * /Every politician got up and said his piece about how good the mayor was and then sat down./