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 MEGHAN PLAYED US ALL! GEORGE CLOONEY BLOW THE GAFF MEG USED HARRY'S WEDDING TO CONNECT WITH CELEBS G-AFFINITY (Trailer) | METAGAV | GENNAO ANOTHEN "ሰላዩ የማፍያ አለቃ" ቻርልስ ሉቺያኖ አስገራሚ ታሪክ sort: relevance, mode: exact match, q: "blow the gaff", maxResults: 4, videoEmbeddable: true, videoSyndicated: true, safeSearch: strict, type: video Subscribe to: American IdiomsEnglish Slang Discuss