spongebob baylypants 

When a skinny, snobby, entitled chick wears butt & form-fitting pants, but her butt, waist and lower back are all the same width, giving not the appearance of an hourglass figure and a shapely rump, but rather the appearance of a square box from the middle of her back to the top of her hamstrings.

Dude, how's that date go the other night? Well, she wore Spongebob Baylypants and her ass looked like ole square pants himself, and when she took them off at the end of the night, it was not much better, but I did make that square box butt jiggle from her back to the top of her legs when I did the deed!

spongebob baylypants by Stagmen June 26, 2017

Ballpants 

When a man's ball are bulging out of the pants

Whoa dude, you got some massive Ballpants goin on right now!

Ballpants by Dick B. Pants May 4, 2011

Ballpanus 

The penis, anus, balls triangle, like the "Ballpanus Triangle"

You better hope nothing ever goes missing in my ballpanus triangle.

Ballpanus by Bacj November 7, 2010

failpants 

1. an interjection, i.e. "FAILPANTS!"

2. a noun meaning a hypothetical garment imbuing the wearer with the inclination to fail, especially unintentionally.

I must have woken up with my failpants on today; I left my homework on my desk in my bedroom!

failpants by whatthehayls December 27, 2009

Caspar Babypants

It's like the Cousin Pam, only in reverse. A male and a female are having sex, and the female leaves, and her step-brother comes in and gets on top of the blindfolded guy...with his butt.

Doug got Caspar Babypants'd by Elaine last night. Her step-brother, Ralph...he needed that.

Caspar Babypants by faultypancake August 25, 2011

Babypants 

Someone with a stink-ass, like the smell you get when changing a baby's diaper.

Man what smells? It is John with his babypants again.

Babypants by Frankzitto March 31, 2009

Bellpants

White underpants made of cotton that fall below the knee making the wearer look a bit of a chav.

Bellpants are pants that you can wear on their own around the nostalgic city of Bath. Very common to find 40 year old men wearing only these pants outside the famous Francis Hotel in Bath.

Bellpants by Katie Stephens October 4, 2005