Wiktionary
wimping out
vb. (present participle of wimp out English)
Usage examples of "wimping out".
Peter thinks I'm a Trojan, cause the other two clerks, they're wimping out to study as the bar comes up, and I'm like, I got it handled.
What was enough was the prospect of wimping out in front of people who had just decided to accept me the night before.
Claudia Kishi, another BSC member, is the one I spoke to on the phone when I felt as if I was wimping out with Logan.
But whatever you do or don't do, stop mollycoddling and conceding and apologising and wimping out.