Reference to Fight Club, whose two first rules were both 'Do not talk about Fight Club'. May be used for anything secret, particularly an organization or group of some sort.

A sarcastic name for singer and songwriter Dua Lipa

The most destructive phase ever spoken, believed to be created by a group of youths during a game of coins way back in 2007, “1 and 2” has recently been discovered by Ukrainian militants and intelligence informs us that they are planning to use it at the Beijing 2008 Olympics to cause a mass state of chaos and havoc.