A party in which all attendees are required not to wear pants or anything below the waste. On occassions when underwear is not allowed, it is strongly suggested that a protective plastic covering be placed on all sofas and chairs for the duration of the party.
Welcome to the No Pants Party, Panos, drop your drawers and find a friend!
by Deac Hungus November 21, 2005
1.) A slang term for sex.

2.) A party or social event where guests are encouraged to not wear pants but instead wear their undergarments.
1.) She invited him to a no pants party at her house.

2.) Brandon sent me an invite to his no pants party next month. Boxers or briefs?
by The girl from the flats September 4, 2014
party where people have sex in each others pants
"let's have a pants party"
by sue March 15, 2005
Party without clothes. Admittedly, even the most extreme pants parties are "pants optional". But seriously: NO SHIRTS!
Dude: You're invited to my pants party.
Dude 2: That sounds a bit gay
Dude: Don't worry, pants are optional. Just don't wear a shirt. Really: NO shirts.
by TreeWeezel April 15, 2011
An event that brings together a collection of exceptional, sextastic individuals dedicated to make one night...one of the most awkward and amazing nights in the history of mankind and THE UNIVERSE!
The Pants Party (especially 2 and 4) were quite possibly the best ever.
by Chazz Rockwell December 11, 2006
When you get an unwelcome erections while wearing jeans or tight pants.
Joe, I'm having a pants party: I can't give my presentation.
by PantsParty===D March 13, 2015
This is when you get together with your bros and you all take your pants off. You then put on each others pants and just hang out with your bros in each others pants.
Who's coming to the pants party? Waist sizes between 34 and 40 inches or I guess you could just come chill and wear your own pants if you can't fit in anyone elses.
by michael_dickless May 8, 2018