Coin sock

When you put coins in a sock and then beat people with it

Boy I’m about to whip you with a coin sock

by number15burgerkingfootlettuce July 29, 2019

Coins in a sock

"Nuts and bolts in a sock" is also common.

This term refers to when exceptionally large women with cottage cheesy buttocks wear thin pants made of such flimsy material that the dimples show through resembling "coins in a sock"
Much more severe that the "cottage cheese stuffed in a hefty bag" look

Steve: hey look at that!
Me: where? oh ew?
Steve: Ha! it looks like coins in a sock!

by pseudoV March 6, 2011