Top definition
When 2 or more people get ultra excited and have an orgasm about twilight.
Person1: OMGOSHHHH I LOVEEE TWILIGHTTT

Person2: YEAHH ITS SOOO GOOOOD! I LOVE EDWARDD!

Person1: I THINK I JUST JIZZED IN MY PANTSSS!!!

Person2: HAHA! YOU JUST HAD A TWILIGHTGASM!
by StanB October 01, 2009
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