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1.
A term that is gaining popularity in first-person shooter online multi-player games like "Modern Warfare: 2". "Coffe Grinding" is the act of, upon a successful kill of another player, crouching over the head of the victim's dead body and proceding to perform a "grinding" motion leaving behind a residue of feces with the consistency of "used coffee grinds". This act is to shame and humiliate the victim player, and usually incites anger and violence. Normally performed when one player is "owning" another or a team of others.
After I knifed him for the 4th time in a row I felt like coffee grinding that loser as he bled out on the floor. I ran over and coffee grinded my ass all over his face and then knifed him again.
by The best part of waking up November 22, 2009
 
2.
in the act of doing a coffee grinder, which is a breakdancing move
that bitch can do a nasty coffee grinder!
by Phishr December 20, 2004
 
3.
When someone crouches over someone lying down and dangles their balls into their mouth while gyrating as fast as they can
I coffee ground your mum so fast last night i think she needs some braces

I am going to coffee grind your sister until her teeth come out
by drildo dan December 18, 2004