Definitions
1.NounAn online drinking game, typically involving a person uploading a video of themselves drinking a pint of an alcoholic beverage (most commonly beer) in one gulp, then nominating two or more others to do the same.
2.Noun↑ "Deadly online 'neknomination' drinking game has officials concerned", CTV News, 6 February 2014
3.Noun↑ Rebecca Pocklington, "What is NekNomination? All you need to know about the Facebook drinking game", The Mirror (UK), 6 February 2014