Having been one as well, I can contribute:
(Forgive any incorrect grammar, high school was a few years ago.)

"Carpe meam simiam"
"Seize my monkey!" Very popular with us around the time we discovered the Sprockets sketches on SNL.

"Sic! Sic! Bene! Optime!"
"Yes! Yes! Good! Excellent!" Not much on its own, but when you combine with heavy breathing and moaning, it takes on a life of its own.

Our coup de grace, and one which I took great pride in translating was "Give me head 'til I'm dead." I just wish I could remember it in Latin.