Des Moines Dip 

Works best with the fellatee standing and the fellator kneeling. At the crucial moment, the fellatee pulls the fellator's lower lip out (much like a mailbox) and deposits a load between the cheek and gums.

"Hey Dean, look over by that dumpster. He's givin' her a Des Moines Dip!"

Des Moines Dip by Ziper December 9, 2007

Des Moines Double Dip 

When the man shits in an unsuspecting female’s mouth and forces her to swallow. He then sticks his dick down her throat to make her throw up. He then makes her eat the vomit containing the shit

My girl broke up with me because I gave her the ol’ Des Moines Double Dip

Des Moines Double Dip by Mike_Litoris_69 April 4, 2019