Top Definition
A party where the guests and host do regular party activities without pants on.
Dude 1: (Walking into apartment building and sees dude 2 without pants) Dude why aren't you wearing pants?

Dude 2: Kathleen's throwing a pantsless party...

Dude 1: I don't wanna kno...
by mrjreds November 29, 2009
5 Words related to pantsless party

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