Also known as Jimmy's favorite word, a donkey ex girlfriend is a reference to someones ex girlfriend that is a total bitch. When you are fighting with them, have one of your friends say, "Tell her shes a donkey ex girlfriend". Additionally, it is Jerry's surname and a fun way to make people angry by use of repetition.
Steven: Becca, tell her she's a donkey ex girlfriend!
Becca: Okay. "YOU'RE SUCH A DONKEY EX GIRLFRIEND"
Jimmy: Stop saying that!
Jerry: I am pink.
Becca: Okay. "YOU'RE SUCH A DONKEY EX GIRLFRIEND"
Jimmy: Stop saying that!
Jerry: I am pink.
by Aardvark Ex Boyfriend January 31, 2009