A very annoying person, that just happens to be your friend. You don't want them to be, because they can be mean, annoying, and complete jerks. If you know a Katie, I would stay away.
Guy- Hey did you se the new girl, Katie?
Girl- Yeah, shes such a jerk!
A girl who looks like dora the explorer, has a protuding camel toe & frequent panty lines, can't sing, and loves to sing amazing grace while canoeing all alone in the mountains of idaho.
Absolute slut, likes small asian cock, 3 holes ( one if you look at the right angle behind the knee). likes guys by the name christian and mike. also possible lesbian.
One girl who goes to The University Of Massachusetts. secretly a mill billy ( some one from the mills) of cape cod massachusetts.
A Katie Mae can live with few necessities some of which include a Becca, A Paul, a little but of hand sanitizer and some coca cola. all of which can be purchased at your local hardware store for under 45,000 dollars.
Boy: Hey Who Was That Hottie You Was With Last NIght?