Day-Pants 

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.

Day-Pants by awilkie1991 December 4, 2010

second day pants 

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.

second day pants by damngrlhowthehell January 21, 2008

5-day pants rule 

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."

5-day pants rule by Justin Briggs 1984 October 22, 2006

period-day-pants 

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

period-day-pants by thornsystem April 14, 2022

National Shit Your Pants Day 

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

National Shit Your Pants Day by TheRealJodgd April 17, 2021

No Pants Day 

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.

No Pants Day by /NickSavage May 7, 2010

National pants day 

On october 18th you can pants anybody you want.

hey boi lemme pants you on national pants day

National pants day by daddyjaz October 17, 2018