chessboard

A friendship between a white person and a black person which is so awesome that experts can't explain it.
Notable examples include J.D. and Turk from Scrubs, Shawn and Gus from Psych, Riggs and Murtagh from the Lethal Weapon series.

Daniel: Henry my black friend you are so awesome
Henry: And you too, my white friend Daniel
Daniel: We are so awesome. Like a chessboard!

Chessboard

A derogatory term used to describe a woman whose chest is so flat you can play chess on it

Xiao Li: I just signed up for chess.com
Richard: Why though? You carry a chessboard everywhere