Green’s Dictionary of Slang

strippers n.

also belly strippers, low belly strippers

[mid-19C+] (US gambling) playing cards of which the sides and/or ends have been slightly trimmed to help cheating.

In phrases

play strippers on (v.)

[late 19C+] (US gambling) to cheat at cards by using a deck in which the sides of certain cards have been microscopically shaved or ‘stripped’.