gonadial fortitude

Basically, not having the gonadial fortitude to do something is the same as not having the balls to do it.

It implies a total lack of manliness and possessing microscopically small balls.

Donald Trump didn’t have the gonadial fortitude to testify in his hush-money trial like he said he would because he was either guilty as hell or he would perjure himself right after the prosecution’s initial question.