A word that you can't find in the dictionary and there is not a real definition is a Non-Webster Word, such as slander; there is no full definition, but you can tell when something is slander through experience
This is a phrase into a word which is unnecessarylong to become a word, but why not add it?
A: Dude, I got this random word I wish was on Webster...
B: Bro, What is it?
A:Bippity-boppity-doo, which is a word-by-me-which-no-one-knows-or-uses-because-it-is-not-in-the-Webster-dictionary-so-I-wrote-this-word-in-the-Urban-Dictionary-site-which-gets-my-creativity-of-words-into-action.
B: You wrote it into Urban Dictionary???
When some resigns or retires from a job, they are on "eternity leave". This can also refer to someone who has passed away, especially someone who worked somewhere for a long time, retired/resigned, then passed away later.
Oh I'm sorry, you didn't know that Kelly is on eternity leave? She resigned and moved to Hawaii!
With regrets I would like to inform you that my boss is officially on eternity leave. I will never see or hear them again. Ever.
The hypothetical man (often a sinistercharacter who decided not to go to boot camp) that is doing your girlfriend/wife while you are on deployment overseas.
Ain't no use in goin home,
Jody's got your girl and gone.
Ain't no use in goin back,
Jody's got your Cadillac,
Ain't no use in feeling blue,
Jody's took your checkbook too.