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. How to pronounce the english word Blow The Gaff .Start with B. Learn from me. Harold Smith's leak, the talk of the town | Britain rigged Nigerian election to favor North KARAN OBEROI- Remix || Picture Gallery X Karan Oberoi- Remix || Picture Gallery XIV sort: relevance, mode: exact match, q: "blow the gaff", maxResults: 4, videoEmbeddable: true, videoSyndicated: true, safeSearch: strict, type: video Subscribe to: American IdiomsEnglish Slang Post my comment