a hairy, creepy guy who lures young drunk girls into dark corners with the intention of taking advantage. most of the time this happens at parties and the "lava monster" asks a drunk girl to accompany him to the bathroom or secluded corner. the term "lava monster" comes from the fact that everything the "monster" touches turns to "lava", meaning the girl wont be touched by any of the "lava monster's" friends because she is tainted
by mcmorris November 20, 2009
A person who acts like a monster made of Lava, With an Ass for a Face......Its pretty self explanitory.
Person 1:Hey did you see that guy slap a baby sea lion in the face?
Pesron 2:Yea dude. What an Ass Face Lava Monster.
Pesron 2:Yea dude. What an Ass Face Lava Monster.
by 15 mexicans July 26, 2011