One of the lads 

A woman or girl who has a lot of male friends and often behaves like a man whilst in their company. These women are very happy individuals as they can hang out with a lot of hot guys without it being totally obvious that they would very much like to bang them. (see harem queen)

"How come you don't feel uncomfortable walking around in your undies in front of Corinne? Doesn't she cop a perve at your bits?"
"No, it's cool. She's one of the lads!"

One of the lads by Corinne Simpson October 15, 2006