noun.  A HUGE vagina, as viewed from the outside of the body, or determined by the amount of empty space on the inside of the body.
Tom Arnold's quote about having sex with Roseanne Barr says it all "...it's like landing a 747 in the Grand Canyon."  She would be considered the owner of a "Vagiant".
OR...
I was with this chick last night, and her "vagiant" scared the living hell out of me!
OR...
I was with this chick last night, and her "vagiant" scared the living hell out of me!
by MOrtlip December 16, 2008
Get the Vagiantmug. 
Get the Vagiantmug. Anything pertaining to something huge, best used with a crowd that giggles at any word resembling "vagina"
"Dude, that is a vagiant bag of Doritos!"
by TheNate November 7, 2006
Get the Vagiantmug. by doover January 16, 2009
Get the Vagiantmug. by Shivers D. August 23, 2007
Get the Vagiantmug. by Holeigh July 31, 2009
Get the Vagiantmug. by Jagged_ice April 28, 2006
Get the Vagiantmug.