Crumbulant 

Being somewhat stupid; slightly idiotic

Jess: I completely forgot to mail those letters yesterday

Jane: You’re so crumbulant
Jess: I forgot to reply to my friends too
Jane: Exactly

Crumbulant by BoredApe68420 February 2, 2024

Cumulant 

A sperm cell that was underdeveloped and somehow won the race

Bro 1: Yo bro you look like a cumulant.
Bro 2: I have 98 chromosomes.

Cumulant by retardBloke42 March 8, 2022

cumbulating

The position a cat is in when it has all of it's paws curled under it's body and has it's eyes closed.

Felix looks so content when he is cumbulating

cumbulating by topperman May 20, 2014

crumblast 

an expression of disagreement or anger

B: Hey, I just lost your fake i.d.
K: ahh crumblast!

crumblast by bbbbrittney October 3, 2006

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

Crumblasted 

When someone goes all in while drinking alcohol or smoking marijuana so much so that they become shit faced.

Dude, I am going to get so fucking crumblasted tonight.

Crumblasted by Shiftedshit January 1, 2018

cromulant 

abundantly used, proliferate, widespread, accepted

It's a perfectly cromulant word

cromulant by Matt Parker (parkman47) November 13, 2002