sound off

Verb (3)

1. express one's opinion openly and without fear or hesitation“John spoke up at the meeting”Synonyms: opinespeak upspeak outanimadvertsound off
2. start playing“The musicians struck up a tune”Synonyms: sound offstrike up
3. express complaints, discontent, displeasure, or unhappiness“My mother complains all day”“She has a lot to kick about”Synonyms: complainkickplainsound offquetchkvetch