(making machine gun noise)

Similar to lol or rofl. Originates from Taylor Moore's laugh. When something is utterly hilarious her tongue rolls against the roof of her mouth, creating a sound similar to machine gun fire.
"Did you hear about the new pirate movie? It's rated arh!"

"Oh, mmgn! That's hilarious!"
by Louise G May 08, 2010
My Media Games Network
I MMGNed all day long mate.
by EndBoss-MMGN January 17, 2011

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