A cut of steak from the bottom sirloin, a butt cut, that is thin and lean, with coarse fibre. It is similar to the skirt steak, flank steak, hanger steak, and like those three, also sometimes called a bavette. It is a cut used to provide the meat found in sirloin tips.

plural of lip flap

plural of pet flap

(idiomatic, colloquial, US) To speak idly; to talk without effect.

With a flapping motion.