pickblow the gaff . blow the gaff {v. phr.} To open one's mouth to reveal a secret. When Al cheated on his wife, his younger brother blew the gaff on him. Categories: add yours verb Source: A Dictionary of American Idioms 'blow the gaff' on video Blow The Gaff Blow The Gaff I’M NOT GRANDAD TO LILIBET! Charles BLOW THE GAFF Shocking CLAIMED LOUIS’ TITLE TO RUIN LILI’S B-DAY MEGHAN PLAYED US ALL! GEORGE CLOONEY BLOW THE GAFF MEG USED HARRY'S WEDDING TO CONNECT WITH CELEBS sort: relevance, mode: exact match, q: "blow the gaff", maxResults: 4, videoEmbeddable: true, videoSyndicated: true, safeSearch: strict, type: video Subscribe to: American IdiomsEnglish Slang Leave my opinion