look up any word, like fap:
When Matt touches you and butterflies take over your stomach causing you to slightly orgasm.
Friend One: What happened!?
Friend Two: He made me Mattgasm!
by Mattgasmer January 26, 2012
the mind blowing orgasm you get whenever you see Matthew Perry
Friends is on I know I'm gonna have a Mattgasm when I see Chandler
by Mattylover January 23, 2007
An experince one recieves when touching themselves at night and kills dinosaurs!! That being said it is like a whole new genre of Orgasm dedicated to Matty boo!!
NO, joke ladies I had the wetest Mattgasm.....Oh my G!!
by Nicole October 10, 2006