The extreme and urgent anxiety that your butt hole feels when you're about to lay major eggs in your pants. Derived from anal anxiety.
Assiety is a registered trademark of What What in the Butt Inc.
Joey: DUDE! you have a bad case of assiety!
(ring... ring... ring... ring...)
Josh: uhhhhh helllo???
Lionel: What up dude!?!?! you okay?
Josh: Man, I've been on the pot allll day. This assiety won't calm down!!
Lionel: I hope i can't catch assiety through the phone.. i gotta go.
Monty: Get out of the bathroom... this assiety is about to explode!!
Carlos: right meow????