Des Moines Diaper 

The act of anal sex with a female that when completed with said act evidence of anal sex is left on the male penis and the said evidence is wiped on the females panties and the female puts the panties back on without knowledge of said evidence.

Dude I fucked that chick from the bar up her ass last night and when we were done I gave her the ole Des Moines Diaper!!

Des Moines Diaper by LIL_MARK June 4, 2009