sextracredit 

using ones god-given assets to improve their grades

Professor Lowell was so desperate, he was offering sextracredit to any and all of his students.

sextracredit by Hazel Wood March 13, 2008

sextra credit 

Performing Sexual favors to raise a grade.

Mactaggart boned ms. Wojtas for some Sextra Credit.

sextra credit by DirtyD November 28, 2004

Sextra Credit 

Sleeping with a professor for a better grade.

Tracy's went to Professor Mustard's office to get some sextra credit.

Sextra Credit by White Shaq June 3, 2003

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 by maithong December 9, 2010