mouth on

mouth on someone

to inform the authorities on someone; to tattle on someone. Max mouthed on his accomplice and got him arrested. You had better not mouth on me!

Name	Pronounced	Usage
Plato	PLAY-to (English)	Ancient Greek (Latinized)
Arnaude	ar-NOD	French (Rare)
Terho	TER-ho	Finnish
Kiyoko	kee-yo-ko	Japanese
Gabrielius	-	Lithuanian
Ghislaine	zheez-LEN, gee-LEN	French