screw up one's courage
idiomPart ofscrew
screw up one's courage — idiom
1. to force yourself to become brave enough to do something difficult or frightenin
1.idiom
Definition
to force yourself to become brave enough to do something difficult or frightening.
Example
Erik screwed up his courage and asked his boss for a raise.
Leila finally screwed up her courage to speak in front of the crowd.