Comes from the Latin words "Magnus Dorkcaus." Today it can commonly be translated to Big Dork, The Accounting Steve Erkel, or Mr. Pocket Protector. J-Mo can also refer to one who supports cheaters, commonly from the New England area, or the leader of the "I have a man crush on Tom Brady and Bill Belichick."
Mommy I want to be like J-Mo. I want to love the Patriots and qoute FASB's in my dreams.