A person who is Hard as nails and you would not want to start trouble with.
"Nah mate, I ain't startin' on 'im. He's Grimley"
by James[BOB]Burton August 08, 2008
1 more definition
when ur pubes rot and u can grow veggies out of them
ahhhhh! hes got grimley
by Liam Hughes October 10, 2007