Top Definition
When you ejaculate gratuitously in your pants making your underwear so messy that it is worthy of being hung in an art museum.
Man, I dry humped the shit out of Britney's leg so hard and for so long that I guggenheimed in my undies.
by Alexnathen December 06, 2008
to have a German manwhore rip your nipple ring off.
Dah! I went to Europe and I was guggenheimed!
by bread infection November 07, 2005
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