Pants optional, if used at a party, actually means that pants are not allowed. All people must drop their trousers immediately (unless they have no underwear)
1: Why are you wearing pants?
2: Because my legs would get cold otherwise.
1: But it's pants optional.
2: Oh. (Drops pants)
An adjective describing a task, endeavor, or prospect significant enough to motivate a lazy bachelor to put on pants and get out of the house.
"You're asking me to come watch LOST Season 3 again? Man, that is so not pants-worthy. Talk to you later."
May also refer to the tight black pants that some girls believe matches with everything and are usually unflattering to the girl's butt.
Cathy has no fashion sense so she's always wearing slut pants.
Pants that are around ankle length, just short enough to look a little unprofessional.
To passive-aggressively stick it to the man.
Kevin wore short pants to work. He was passive-aggressively sticking it to the man.
Black leggings worn as pants. Especially popular among sorority girls.
"I've got to get some sorority pants before rush or I won't look like everyone else!"
"Look at those Tri-Delts up there...all of them are wearing sorority pants!"
A man's undergarment that acts as a modern day cod piece, enhancing the size of the genitalia. Typically thong or g-string style in bright or neon colors. This phrase is only used from the man's perspective, as no woman actually finds these undergarments attractive.
"Tonight, I'm wearing my awesome-pants."
Awesomepants.com
Party without clothes. Admittedly, even the most extreme pants parties are "pants optional". But seriously: NO SHIRTS!
Dude: You're invited to my pants party.
Dude 2: That sounds a bit gay
Dude: Don't worry, pants are optional. Just don't wear a shirt. Really: NO shirts.