blow the gaff
To reveal a secret; to inform against someone.
“Not a word, mind — don’t blow the gaff on the surprise.”
❦ Note: To ‘blow’ was to expose; the gaff was the secret or trick being hidden.
To reveal a secret; to inform against someone.
“Not a word, mind — don’t blow the gaff on the surprise.”
❦ Note: To ‘blow’ was to expose; the gaff was the secret or trick being hidden.