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1.
That great girl who can just chill and be 'one of the guys'. She's into sports, beer, action flicks and doesn't give a damn what others think.
However, unlike the tomboy, she has her gang of girl mates who she shops with and does girly stuff.
When attractive, this girl is mysterious and elusive. Acts aloof and gives off the 'cool girl' aura, like she's very aware of both guys' and girls' worlds.
Ally, she's a real guy's girl
by Quin5 November 08, 2006
 
2.
A mix between tomboy and girly girl. Hangs out with mainly guys and has boyish interests, whether it be sports of comics, or boyish taste in films and tv. But still keeps a group of girl mates to shop with, watch chick flicks with and gossip about boys. She is usually the only girl in a group of guys. The guys talk openly in front of her and she wouldn't be out of place going to a strip club with them. A guy's girl enjoys the freedom guys have in farting, eating disgusting food and in how they discuss sex, but still likes to look and feel like a woman.
girlfriend: "why do you always have to hang around with {insert name of guy's girl}"
boyfriend: "she's just one of the boys"
by Being One Of The Boys November 26, 2009