Big Black Kamera. Refers to a professional-grade SLR camera (all of which are big and black). Particularly relevant when a large (~200mm f/2.8) lens is attached and the photographer is a nerdy Caucasian male. Used as a seemingly innocuous innuendo to the Big Black Kock definition of the TLA.
Only spoken by a photographer with a large camera in-hand:
"Don't be afraid of my BBK, baby- I know how to use it!"
"I'll let you hold my BBK if you promise to be gentle."
"I'm going to shoot all over that bitch with my BBK!"