cumbustability 

The ability for me to cum on your mother's bust.

Dude, my cumbustability was at an alltime high yesterday.

cumbustability by EBRJ July 9, 2010

combustability 

The ability for me to come on insert friend's name's mother's bust.

Kenny Hotz: Combustability... is that he ability for me to come on Spencer's mother's bust?

Spencer Rice: Shut up! just SHUT UP!

combustability by Jamessch January 11, 2009