Placing the highest denomination note, like a c note
on the bottom of a stack of bills and then folding it up to give the appearance that you have a stack of c note's, or in any case a lot more money than you actually have. Primarily used for showing off or showin up.
How much money you got son, (pulls out the gypsy roll), "I got enough" - "Oh, oh, oh, we got us a high roller
up in here"