Flapper wagon Share definition Flag An uncircumcised penis that gets jerked off to the point of climax and you leave the semen in the uncircumcised flaps. Klinton has a nice flapper wagon!Did you see his flapper wagon? It really held his cum. Flapper wagon by Pandaassassin1 May 6, 2021 0 0 Get merch Get the Flapper wagon mug. Buy Now — $32.95 See more merch