This will work with 2 people but it would work better with six.

Starts off with the youngest person as the word master, they pick a word, any word in the english language that comes up a lot, or not, doesn't matter. They dont tell anyone this word. This is the drink-word.

The wordmaster must yell DRINK and point at the person who says his/her word, and can say it as fast or as slow as they wish given that they dont want people to figure out the word.

 The other players must carry on conversation, meanwhile the the wordmaster has to tell people to drink when they say his/her word, the game ends when everyones cup is empty, or someone figures out what the word is.

A variation to this may be if they go around the table, and everyone has to say a sentence, and at the end the wordmaster tells them if they said the drink word or not.

Once the word master's word is found out, it goes on to the person to the left of them.

Drink Responsibly,

Lightxspeed