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1.
Shady, of suspicious character, untrustworthy
The guy who owns that shop is really grifty. I think his business is a front for illegal activity.
by T.M. Mann August 14, 2007
 
2.
A state of hair growth, not very long. Stubble-esque, but emphasis on a spikey, rough and undesirable feel.
He hadn't shaved for a day, so his face was grifty.
Her boyfriend was away, so it didn't matter that her legs were grifty.
by Alan Ramsden January 22, 2007
 
3.
A split between Great! and Nifty! for those who don't know wether to sound like a normal person, or a tard.
Wow! That drag race was.. grifty! Yah!
by LeekunEG June 21, 2005