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1.
1) A place where nerds gather to insult each other and act like idiots.

2) An expression of Ego. "I rule at Maggied".

3) An act of conglomeration, an induction in to a nerdish society of super-dweebs. "You've been maggied."

egoegotisticnerd
Maggied is hetero, everything else is unhetero.
by William Harold Oami. December 01, 2003
 
2.
To accidently cum in a girl's hair. Not to be confused with directing cum in a fashion that reflects purpose.
I totally maggied that girl we met last night.
by whoreno1 October 18, 2014