Top Definition
When a movie or movie news is so awesome that you ejaculate in your jeans/leg wear
Cinephile 1:Donald Glover to be Spiderman

Cinephile 2: I just came in my shorts
Cinephile 1: We call that a Cinemagsm
by DG4Spiderman May 03, 2012

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.