Top definition
A National holiday in which the first Friday of May you wear no pants or shorts over your underwear.
Girl: Why did dad go to the office today without his pants on?
Brother: It's the first Friday of May you retard, No Pants Day.
Brother: It's the first Friday of May you retard, No Pants Day.
by /NickSavage May 06, 2010
2
A national holiday usually celebrated in australia on May 5th in which you wear no pants or shorts over your underwear.
I was pimping down the streets all nonchalant on May 5th when i saw someone with no pants and realized it was "no pants day".
by MonkeyPimp March 18, 2006