When someone has smoked too much weed and passes out for hours.
Man that bitch is fuckin' fossilized.
by Do Kari April 02, 2011
The state after being fucked so hard, a girl lays in bed motionless like a fossil afterward
Dude I fossilized Cindy so hard last night she couldn't get up for work this morning
by Dan-Druff December 15, 2010