stack your grip 

while "grip" sometimes denotates a specific amount of money ($10G), it is also an expression with pimps, hustlers and gangsters for any large amount of money one is holding on to ('grip') and not letting go of except in an emergency (posting bail, paying damages, getting out of town, etc). This is known in the square world as "prudent reserve" (3 to 6 months living expenses).

youngsta: "I want to get some sick-ass'd rims for my ride!"
OG: "You betta hold on to your cheddah! You gots to stack your grip, young brotha!"

stack your grip by psychosufi May 3, 2010

gripping your dome 

When someone grabs the back of your head and clutches it.until the person stops

Wyd... Nun just gripping your dome
Yo stop

gripping your dome by Vaye November 14, 2015