Have the guts
Have the courage(to do something). When someone is afraid, it is common to use the expression not have the guts. The positive form is often used in questions.
A: Shall we try a sky diving?
B: No, I don't have the guts.
Refs
- All Clear 3, Helen Kalkstein Fragiadakis
idiom, 14-02-11 10:08, 14-02-11 10:08, Yosei