sing like a canary

To inform against someone to the police or other authority about his or her criminal or illicit behavior. I heard Joey Malone has been singing like a canary in the hopes of getting his sentence reduced. Let's make sure he's sleeping with the fishes before he gets the chance!

Common Names:

Name	Pronounced	Usage
Tryphaina	-	Biblical Greek, Ancient Greek
&Aelig;Lfswi&Thorn;	-	Anglo-Saxon
Arndt	AHRNT	German
Arnborg	-	Swedish (Rare)
Pallabi	-	Bengali
Setsuko	se-tsoo-ko	Japanese