beat one's gums
v. phr., slang To engage in idle talk, or meaningless chatter; generally to talk too much.
"Stop beating your gums, Jack," Joe cried. "I am falling asleep."
Compare: CHEW THE FAT or CHEW THE RAG, SHOOT THE BREEZE or BAT THE BREEZE or FAN THE BREEZE or SHOOT THE BULL.

[TahlilGaran] English Idioms Dictionary ▲