blow the gaff

(British old-fashioned, informal)

to cause trouble for someone by letting other people know something that they were trying to keep secret (often + on ) They killed Green because he was about to blow the gaff on their drug dealing.

Common Names:

Name	Pronounced	Usage
Kwame	-	Western African, Akan
Telesphoros	-	Ancient Greek
NgỌC	-	Vietnamese
August	OW-guwst (German, Polish), AW-gəst (English)	German, Polish, Swedish, Norwegian, Danish, Catalan, English
Kenith	KEN-ith	English (Rare)
Neeraj	-	Indian, Hindi, Marathi, Gujarati