Best definition
Pretending that one cares about the mistake they made.

Zwoops. I forgot to pick up my mom at the paper. Sue me.
zwoops: define #2
The state marked by firm turgid form and erect position of a previously flaccid bodily part containing cavernous tissue when that tissue becomes dilated with blood. In other words a boner.
I accidently got a zwoop while dancing with Ramin.