A game made by guys involving two people asking eachother questions to get to know eachother.
Often used as a segue to sext or talk dirty with a girl or guy that may turn into a game of truth or dare to get naked pictures
Mike: Hey Sarah, want to play 20Q?
Sarah: Yeah Sure, you start!
Mike: What's your favourite colour?
Sarah: Red! What's your favourite meal?
Mike: Pasta! How many kills do you have?
Sarah: Uhmm.. 4. How big are you? Mike: 6'' .... Want to play Truth or Dare?