When you cum on someone (face,mouth,etc.) and the partner wasn't expecting it and in a fit of rage collects the cum in their hand and then slaps the other partner in the face.
by AFROSAMURAI05 May 13, 2016
Get the Shumpedmug. "...The guy is Dr. Peter Shumpmaker. Lord knows what a 'shump' is but you can bet your bippy his ancestors made them." -Shoreleave
by Koros December 15, 2009
Get the shumpmug. by Skaiderade April 5, 2015
Get the Shumpmug. by morgan smeltz May 3, 2008
Get the shumpingmug. by Brightstar March 21, 2007
Get the shumpmug. by DeezBolas July 2, 2018
Get the Shumpmug. 