Spin the bottle is a party game in which several players sit/stand/kneel in a circle. A bottle is placed on the floor in the center of the circle. A player spins the bottle, and must kiss the person to whom the bottle points when it stops spinning. It is popular among teenagers and is very embarrassing to most. There are a very large number of variants. One variant is that instead, two players must hug within 5 seconds, otherwise, they have to kiss in 10 seconds and if the 10 seconds are up and they haven't kissed, they have to French kiss.
Variations allow for other tasks to be accomplished. It can also be used to decide the player for another game such as Truth or Dare? or the Dice Game.