An energetic, sometimes boisterous girl whose behaviour and pursuits, especially in games and sports, are considered more typical of boys than of girls.
In other words, the best thing ever.
We do not discount the strengths of men or women. In fact, the greatest ideal for a human is to achieve the strengths of both. In that spirit, the majority of our clothing is unisex, and the designs are meant to look good on anybody. We are all fucking awesome.