A girlfriend who constantly starts an argument with her boyfriend, gets jealous quickly, tries to make you mad, etc. She tells you not to do something but she does it, She makes jokes that make you mad, She talks to other guys, She is very jealous.
Gf: Who was that girl you were talking to earlier?
Bf: My friend
Gf: Who?
Bf: (her name)
Gf: (gets mad, catches an attitude)
Bf: But don’t you have a boy best friend? Why are you mad? Your a toxic girlfriend.