Get up the nerve to call -- is that an idiom?

[amna]

I could not understand what is the meaning of this sentence.

I finally got up the nerves to call.

PLease reply me with explanaition, How can I use it in conversation or Writing.

Thanks (YOU guys are really helpful)

Amna

[Mister Micawber]

.
It is usually singular, Amna-- 'I got up the nerve to call'. It means, 'I finally emboldened myself to call', 'I finally summoned the courage to call', and is common in casual conversation.

'I can't get up the nerve to ask her for a date / sign up for the TOEFL test / go bungee-jumping.'
.
_________________
Native English teacher at Mister Micawber's

[Rich7]