Neknominate

Neknominate, also known as neck and nominate, neknomination or neck nomination, is an online drinking game. The original parameters of the game require the participant to film themselves drinking a pint of an alcoholic beverage, usually beer, in one gulp and upload the footage to the web. The participant then nominates two others to do the same, although a third nomination has also become commonplace. The nominated person has to complete the task within 24 hours.