A female with whom you exclusively have sexual relations. Unless it's an open relationship, in which case, see fuck buddy, cock holster, or Janelle.
I've got a girlfriend who's better than that, and nothing is better than this. Or is it?
By Nope
A pet name for your vagina
"I'm going to get some tonight I better go shave my girlfriend!"
By LexiLee
a complete moneysucking bitch who takes ownership upon your balls.
friend-hey man wanna go to the concert? guy-yeah! girlfriend-no you said you were taking me to the movies PWNAGE!
By Steve-o59
some member of the female persuasion who currently has the benefit or misfortune depending on your perspective to be sleeping with me.
"yes thats the girlfriend I'm shagging tonight"
By 3 meter skis
Penis depository
My girlfriend is the best penis depository
By Sgt. SkullFucker