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sound off(about something)
1. to complain about something; to gripe about something. You are always sounding off about something that gripes your soul. Just sound off if you've got a beef.
2. to speak out of turn about something. Who asked you to sound off about this? Don't just sound off without raising your hand.
to speak something loudly; to call out one's name or one's place in a numerical sequence. All right, sound off, you guys! Each one sounded off.
Express one's views vigorously and loudly, as in Dad's always sounding off about higher taxes. This expression probably comes from the original meaning, that is, "strike up a military band." [Early 1900s]
1. To express one's views vigorously: We went to the town meeting to sound off about potholes in the roads.
2. To chant or count in time with one's step when marching in military formation: We heard the soldiers sounding off as they marched by.