get up (one's) nerve (to do something)

To muster or draw upon one's courage or resolve to do something. I wanted to ask Mary Sue to the prom, but I never got up the nerve. I hope Jonathan finally gets up his nerve to ask his boss for a raise.

Common Names:

Name	Pronounced	Usage
Gwen	GWEN	Welsh, English
BÉBinn	BAY-vin (Irish), BE-veen (Irish)	Irish, Irish Mythology
Proinsias	-	Irish
Bieito	bee-AY-taw	Galician
Lotus	LO-təs	English (Rare)
Phyllis	FIL-is (English)	Greek Mythology, English, German