underpantsed

the state of not being pantsed enough

Jock #1: Hey Jeff, check out Ben over there. He's way underpantsed.

Jock #2: Yeah, let's get him.

underpantsing

To Pants someone but to pull there underwear down simultaneously weather purposely or on accident

Dude that kid got underpants in front of EVERYONE, they saw his junk and everything

Yo i was Underpantsing this and he punched me, It was a freakin accident i just wanted to pants him