grimmin

To give someone dirty looks or to stare them down. Also known as "mad doggin".

Damn homie, that fool was grimmin. Let's punk his ass.

by Baby Blaze420 July 20, 2006

grimmin

(grimm-in)verb: To threatin to kill; to grim

ima b grimmin u if u don't shaddup!

by Elz3r September 26, 2005