Acronym of "Bite my
shiny metal ass", a phrase used by the acerbic,
beer swilling robot "Bender Bending Rodriguez" in the Fox TV show "
Futurama"
Fry:
Hey! A phone booth! I can call my nephew.
<An impatient robot joins the queue behind him. It is more or less human-shaped, grey, with an antenna on top of it's head.>
Fry:
Wow, a real live robot! Or is that some kind of cheesy New Year's costume?
Bender: Bite my shiny metal ass!