You need a group of minimum three people, at least one unaware of what's going on, and two competing to win.
The competing players give one another a specific word, phrase or even a short sentence. Depending on the desired
difficulty, it can be anything from a single and often used word to a totally ridiculous sentence.
The aim of each player is to manipulate the conversation and deviously make the unaware member(s) of the group say
his/her specific word, phrase or sentence within the natural course of conversation.
The player who makes the unaware conversant say his/her target word is the winner.