A "usually Caucasian" woman who (for some reason or other) dates men of Pakistani, East Indian, or Afghani descent. Derived because white people, when eating Indian food, order butter chicken 90% of the time.
Look at Shannon and Mia with Abtar and Mohammad... they're such butter chickens.
A Sex position where the male lies on his back enjoying a plate of butter chicken which is placed on his belly while the female partner pleasures him, preferably in the cow girl position !