mrn by Nicknamethatisnotused on May 20, 2009 09:28:33 A shorter way of calling someone a moron. Example: Omg, u mrn!
mrn by Ub3rpwnag3 on Jan 04, 2008 12:17:43 masturbating right now Example: dude 1: hey dude sup? dude 2: stfu i'm mrn! dude 1: sry