1.Supposedly the sexiest on earth. No one knows who they are, but their name is commonly referred to when talking about sexiness.
2.Also shortened to 'Kat' to refer to sexiness. Usually followed by a purr like noise commonly made by men.
"Oh my gosh. That chick is such a Kat
!" *purr* -guy
"You're soooo right. That's a sexy little Katelyn