A word that don't mean nothin'.
From the First Book of Humpty: "I'll use a word that don't mean nothin', like 'looptid'"
A word hasn't meant nothin'. . .but should. Therefore, it's new definition:
Adj. - Word used to describe a night of partying that escalates from "hanging out at a local bar" to "bringing half the bar back to your apartment and staying up all night doing blow with lesbians"
"Dude, last night was totally looptid! Whoever invited those strippers and their girlfriends back, I owe them money because I did all their drugs. Sorry."