K3=R
A parody of the E=MC2 equation. K3=R stands for "K cubed (KKK) equals R (Racism)". This is a Ku Klux Klan condemning graffit tag used and invented by Australian graffiti artist "Proxy". It was invented in 2007.
Racist: "look at those black shits"
Proxy: "K3=R, motherfucker!"
Proxy: "K3=R, motherfucker!"