Slang used in MMORPG to represent a male playing a female character. Usually the role play is very convincing and done to the end of getting free currency, hard-to-get items, etc. from others.
To have female like qualities such as not being able to consume a lot of alcohol, complaining, and ditchingfriends to do non-essential things such as studying, or hanging out with a significant other.
This is a great party, where is micah at? Oh he's being a mangina tonight.