To fuck a woman from behind as she vomits in the toilet.
Guy 1: "I Gave that bitch the ground chuck"
Guy 2: "Whats That?"
Guy 1: " I Fucked her so hard she puked!"
To Snarf means to sneeze while throwing up, regardles of which action came first, and causes a massive dispersion that can be very inconvenient in certain situations.
While driving home from the party, i snarfed so hard it covered my windshield.