A Guy or a Girl of whom you don't know whether he/she is a Guy or a Girl.
Person 1: Is that a guy or a girl?
Person 2: I have no fucking idea
Person 3: I think it's a guyrl..
Person 1&2: A what?
Person 3: A guy + girl = Guyrl.. When you don't know what gender a person is.
by Xilios August 5, 2010
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