A word added to Urban Dictionary that has never, ever, been used by anyone in real life, but is instead created by one person thinking they are funny. Easy to spot because:
The page has one definition.
You have never heard of said word or phrase before.
Appearing as the word of the day.
Person #1: 'I climbed an organic stairmaster the other day, then I signed on a neverendum.'
Person #2: 'Stop trying to make words up, you dumbshit. Nobody finds it funny when you make a fake definition. Help yourself to some cyanide.'