Pants in which one sees on another and desires. The desires can be so great that the desirer may suffer from chronic sleeploss and kleptomania. The desirer may also follow the wearer of the Holy Grail Pants wherever he/she may go.
Woman 1: OHMYGAWD! The Holy Grail Pants are calling to me!
Woman 2: Sophie, calm down! (To the third woman) Quick, call the doctor, Sohpie's in one of her stages again!
The phrase "Blow a Hole In Your Pants" typically means when somebody farts/shits in their pants with such force and sound that it would make somebody believe the pure strength and heat of said fart had the power to blow a hole in their pants. Typically smells like liquid ass.
Braydon: God damn did you just blow a hole in your pants!?
Kaid: You betyour ass I did. It was wet and it smells like shit over here!
Braydon: I know, god damn check yourself.