It's like
a donkey punch, but instead of injaculating in her anus after hitting her
in the back of the head, you stick your arm in her anus more than
4 times.
Matt:
Rocket donkey punch that shit man!
Andrew: What's that?
Matt: Smack her in the back of the head and stick your arm in her ass
4 times!!
Andrew:
Ahhh!!