National Shit Your Pants Day, which takes place on April 28, is a regularly-celebrated holiday in the Midwest Region of America, most likely devised by clothing companies to sell replacement underwear and pants to partakers.
David: Why're you eating so much?

Mark: Tomorrow is National Shit Your Pants Day, I want to celebrate it with my girlfriend. Every year we shit each other's pants.
David: Romantic
by TheRealJodgd April 17, 2021
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The last thursday in March developed in the early 2nd century BC by celtic traditions. Annually, observers forsake their traditional shorts and skirts for pants in honor of this holy day. To not observe this holiday is to flip god off.
by fastrun97 March 26, 2015
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November 13th, national pee pant day is when pee pant

come on guys, gals and non-binary pals!! Don’t be a pussy and pee pant

“How come he hasn’t pee pant yet?”
“I know, what a loser”
by Frog tibbies November 13, 2020
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Pajama bottom pants. These pants are ideally worn during the day. Usually Day-Pants are worn on days that are considered lazy. Also Day-Pants are the pants you would wear after a good nights rest but decided not to take them off.
looks like it's going to be a lazy day. It seems like a good day for Day-Pants.
by awilkie1991 December 3, 2010
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jeans that fit perfectly, on the second day of use; first day pants are a bit too tight, but second day pants feel great.
It feels so good to put on second day pants and not worry about a muffin top.
by damngrlhowthehell January 21, 2008
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pants someone wears when on their period, usually comfortable and dark coloured so they dont get stained.
person 1 : are you on your period?
person 2 : yeah, how'd you know?
person 1 : you're wearing your period-day-pants
by thornsystem April 14, 2022
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In a college environment, a student's wardrobe is governed chiefly by the "5-day pants rule" (FDPR). The FDPR states that any student may wear the same pair of pants no longer than 5 consecutive days, after which they must change pants and shower. Most new college kids perceive this as excessive, and are new to the idea of not showering every day, but Sophomores and beyond know the need for this rule.
"Hey man, 5-day pants rule, and they've been rank since you spilled milk on day 3."

"Ahh, you're right. Better go change up."
by Justin Briggs 1984 October 23, 2006
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