Top Definition
when a girl has an orgasm that is similar to smashing a watermelon over her head
Yo, howd it go last night. . . . . .
Bro, i brought that girl back to my place and served her a gallagasm........Yah, she was knocked out with juices dripping everywhere
by Gallagopher August 19, 2007
5 Words related to Gallagasm

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.