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One of any number of anime fangirls who dress as Sailor Moon (or one of her cohorts,) but whose body type is obviously not fit for the role (i.e. they are fatties.)
Me: Yo Josh, check out that cosplayer over there!
Josh: Man that is one ugly Sailor Moo!
by Scaramanga9 June 28, 2006

Words related to Sailor Moo

sailor moon anime cosplay cow and chicken fangirl fatty
n. A nightmare or hallucination caused by eating too much shrimp tempura before watching a 12-hour Sailor Moon and Cow and Chicken DVD marathon.
Oh, man... I had a bad Sailor Moo last night
by Zelita May 09, 2005