Describing anything, anyplace OR anyone that is dirty. Slutty. Nasty. Sometimes ugly, and definately Grimey. Or Gross. Usually used to describe females, certain males, and most nightclubs/bars.
"Who the fuck does Mel think she is? She is SUCH a gritty bitch. And we are SOOO not friends anymore!" Diana said, angrily.
"I know... right?!" replied Brianne.
"She's just as gritty as the Pulse on Wednesday Night!" Keri followed.
"I know... right?!" replied Brianne... again.