The story
From neck (“to drink very quickly”) + nomination. Originated in Australia and gained popularity on social media.
Etymology from Wiktionary, CC BY-SA 4.0.
neknomination
Today it means: An 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. Full definition →