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
Sophie	['səufi]
Kirsten	KEER-sten (Danish, Norwegian), KUR-stən (English)	Danish, Norwegian, English
Dye	-	Medieval English
Lola	['ləulə]
Lucjusz	LUWTS-yuwsh	Polish
Eysteinn	-	Ancient Scandinavian, Icelandic