Enormous, very large, so large as to be likened to a whore's vagina, whorey, slutty, and hollowed out. The biggest possible. Gender specific. Anything you can apply to a worn out hooker's vagina. Hotdog down a hall-way.
She is so worn out she's vagantic!!! Quit acting vagantic!!! Wow, your mom is vagantic!!!
1. Ridiculous, pedantic, acting in any form of dumb ass, smart ass, or asshole manner.
1. "Quit being so vagantic."