What is a reverse trap exactly? A girl who looks like a guy?

Pretty much

@MyInnerFred well mare is a male. I wouldn't say he's a reverse trap. More like a normal trap. Maybe you're thinking aura not mare. 

Oh darn, in this case your right. Hmmm

@MyInnerFred this might sound barbaric or crude but the one with the stick is the boy. That's how I remember anyway. No puns in intended