[syn: complain, kick, plain, sound off, quetch, kvetch]
WordNet (r) 3.0 (2006):
sound off
    v 1: express one's opinion openly and without fear or
         hesitation; "John spoke up at the meeting" [syn: opine,
         speak up, speak out, animadvert, sound off]
    2: start playing; "The musicians struck up a tune" [syn: sound
       off, strike up]
    3: express complaints, discontent, displeasure, or unhappiness;
       "My mother complains all day"; "She has a lot to kick about"
       [syn: complain, kick, plain, sound off, quetch,
       kvetch] [ant: cheer, cheer up, chirk up]