A rule or practice that, while not technically official, is generally agreed upon and followed. (i.e. an unwritten rule)
Guy 1: Dude, what was that? Everyone knows it's not cool to screen peek!
Guy 2: Whatever, who made that rule?
Guy 1: It's consensus law, bro.
Guy 2: Whatever, who made that rule?
Guy 1: It's consensus law, bro.
by MuteButton October 29, 2011