2 girls and 2 boys are needed.
The boys stand behind each girl and do her in the butt, while high-fiving each other over their heads.
The girls must insert a double-sided dildo into their vaginas while grabbing each other boobs.
"I can't believe you did a Mount Rumpke last night; you're sick."

"Everybody wins in a Mount Rumpke."
by LBSig October 2, 2008
Get the Mount Rumpke mug.