I'm trying to make a really funny gamertag for xbox live, please help me!?

Why not stick with the basics? There are a lot of guys that pick silly names like that too, so the only way to really let them know you're a girl is by talking on the mic. But as far as being funny, just go with something simple like girlpower or your name + owns. No one is going to read your name and take you too seriously until you beat them, and then once they hear your voice, you will get literally 1000 friend requests a day.