The act of biting down softly while giving head, so the teeth are gently scraping the wang. Not meant to shock the male, but just to startle him enough to make him pay attention and not start thinking of something else while he is sitting back.
Bro 1: "Yo brosef! I heard you got some last night from that girl at the bar! How was she?"
Bro 2: "Well it was going pretty good. She was suckin' on my thang and I was just sitting there thinking about lax and stuff, when she started cheese grating me out of nowhere. It was kind of weird, but pretty rad at the same time.
For Normal Kids:
A- Amazing
B- Great
C- Fine D- Not So Good or Below Average
F- Bad
Asian Kids:
A- Average
B- Below Average or Bad
C- Can’t Have Dinner
D- Don’t come home
F- Find a new family
Guy: No wonder why Asians are so smart. The Asian Grading Scale is so strict
(gwa-ving) - v. to guave - the act of two or more individuals of the female persuasion abrading their labia majoras together with stimulation resulting from the thrusting of the hips; usually done for sexual gratification.
holy shit, my nizzel, did you see those two beotches guaving? i have a serious boner from that guave-sesh.