Cromulent 

Used in an ironical sense to mean legitimate, and therefore, in reality, spurious and not at all legitimate. Assumes common knowledge of the inherent Simpsons reference.

Yes Professor Smith, these citations are perfectly cromulent. chuckle

Cromulent by Bradley Yeats, Professor of Linguistics March 15, 2003

credulant 

A person who is too credulous and just believes everything they see on the internet.

Stupid credulants, clogging up Facebook with all their hoaxes and virus warnings and stuff. Why don't they just think for a bit first?

credulant by Bdoserror October 26, 2011

Cremented 

When you're so absolutely ruined from being tired and drunk and every other crashing emotion and can't comprehend anything but the sweet release of death.

Did you see John? he spent all night trying to deal with Jennifer and he became horribly cremented. poor bastard!

Cremented by MeefsTheDragon March 8, 2017

cromulant 

Not simply used to refer to a frequently used word as per the use in "a perfectly cromulent word" but may be better defined as germane, or apt, synonomous with appropriate, or fitting.
This defintion suits both uses in The Simpsons' famous episode.

"a perfectly cromulent word"

"he has just embiggened the office of town crier with that cromulent speech"

cromulant by RathminesPimp October 26, 2004

cromulentiousness 

krahm-U-lehn-chus-NESS (n.) A word first used on the internet via www.reddit.com, subreddit r/funny by u/FLUX-YOU, that caused mass hysteria in an attempt of discovering the definition due to the lack google results.

There are no examples for cromulentiousness. I apologize.

cromulentiousness by the_third_three November 7, 2013

Cromulent 

I believe this term originated in the Animated Television Series "The Simpsons"

Edna: Embiggens? I never heard that word before I moved to Springfield.

Ms.Hoover: I don't know why. It's a perfectly cromulent word.

Cromulent by jimjam June 8, 2004

Cromulent 

Expression used to legitimize another expression of dubious existence. Used in the ironic sense in that it defends the questionable use of an illigitimate or slang word with another made-up expression. The intent of the phrase is generally used in conjunction with insults to high talkers, english majors and otherwise insufferable people who feel the need to correct others. Often accompanied by a punch to the stomach.

You grok what I mean, yo? (person in the know) There is no such word as grok! (Buzz kill) Grok is an exceptionally cromulent word. (street wise hommes)

Cromulent by Anonymous July 22, 2003