sextra credit
Performing Sexual favors to raise a grade.
Mactaggart boned ms. Wojtas for some Sextra Credit.
sextra credit
the extra money you get when you perform sexual acts
Girl says, "Damn, I'm short three bucks. I'm gonna go get some sextra credit."
Sextra Credit
Sleeping with a professor for a better grade.
Tracy's went to Professor Mustard's office to get some sextra credit.