Английский словарь американских идиом - button one's lip

also zip one's lip {v. phr.}, {slang} To stop talking; keep a secret; shut your mouth; be quiet. * /The man was getting loud and insulting and the cop told him to button his lip./ * /John wanted to talk, but Dan told him to keep his lip buttoned./ Syn.: KEEP ONE'S MOUTH SHUT, SHUT UP.