SPV Rule

whenever combining multiple colors together (i.e. painting), you are likely to be subjected to the SPV rule. That is to say that the resulting color will either look like shit, piss, or vomit.

Guy A: I was painting something the other day, and when I combined black, yellow, and red it kind of looked like--
Guy B:--shit. Yeah, I know. That's part of the SPV Rule.