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say one's pieceand speak one's piece
to say what one must say; to recite what one has planned to say. Look, just say your piece and get out of here. I said my piece and left.
say your piecealso speak your piece
to express your opinion about something, esp. something that you do not like When the young man interrupted, the president stopped talking and let the man say his piece.
say your piece
to express your opinion about something, especially something that you do not like I don't feel there's anything more I can add now - I've said my piece.