Wiktionary
wimped out
vb. (en-pastwimp out)
Usage examples of "wimped out".
She had wimped out something awful tonight, and that could not be allowed to go on.
She only knew that if she wimped out now, it was all over for her.
The last time you wimped out and went nuts rather than consider that possibility.
Here he was, supposed to be a tough, sardonic New York City cop, and he'd wimped out.
Deckard had already wimped out and quit the force back then, mainly out of chickenshit queasiness over blowing away defenseless replicants .