Flap (one's) gums verb phrase
To talk for a long time about unimportant things
I don't want to hear you flapping your gums anymore, so please stop it.
Let's do it and stop flapping your gums about it!
A: Do you know you're flapping your gums? B: Oh, sorry!
To use, do, or say something so often that people become bored with it
To talk continuously about things that are silly or unimportant
1. Used as rhyming slang for the pipe
2. Used to indicate nonsensical or foolish talk
3. Used to indicate a situation in which a girl is on her period and wipes the toilet paper with a red spot that looks like a cherry ripe.
To talk constantly.
To blather or chatter; to talk aimlessly or meaninglessly.
The verb "flap" should be conjugated according to its tense.
At first I thought he had a sense of humor but soon I realized he just kept flapping his gums.