A noun which pertains to an elderly person, usually with gray hair, driving an automobile with knuckles clenched on the wheel and forhead aligned to the dashboard, and a craning neck to look over the wheel, all done while driving far below the speed limit.
$10,000. Named so due to the size of the wad of bills. Unlike a "stack" which is how 10 $100 bills are put together (in a stack), a grip is 10 stacks, only way to hold it is to grip it because its all rolled up.
"Walk around like I got a grip in my pants, yea thats about 10 stacks..." -Young Jeezy