nahmnahmnahm - the sound your mouth makes when you're too full to speak but

the sound your mouth makes when you're too full to speak but still trying to talk

I was nahmnahmnahming so much, I couldn't even say I was full.

My mouth was nahmnahmnahming like it was doing a dance party.

I tried to tell my friend I was full, but I was just nahmnahmnahming like a confused robot.