importancies 

extremely important belongings or important events/errands

I have to pack all my importancies and move because a spider tried to become my new roommate

importancies by MrsEilish213 November 21, 2021

unwarranted self-importance 

A serious form of narcissism. To act as if one is an important person without actually doing anything worthwhile to prove it, thus making one look like a complete tool.

Sometimes abbreviated as USI.

Idiot: Hey guys! I just put up all these sweet pictures of myself on Facebook, and I've got this vlog that you've gotta check out. If you don't, you're clearly some kind of lesser being, 'cause everyone loves me for no reason!

Smart Person: Sounds like unwarranted self-importance to me.

unwarranted self-importance by IrishBarbarian January 23, 2011

Importantist

Super duper important the most important thing ever (lily and Katie)

Katie: lily you’re the most importanist person ever

Lily: no you are the most importantist person ever katie

Katie: no u

Importantist by Katieandlilyxxxx August 16, 2019

Person of Importance 

A key person whose actions and opinions influence the events around them.

Ever since Megan's got the job, she's become a Person of Importance.

Person of Importance by the_surveiller May 16, 2013

Self-importance 

An exaggerated sense of one’s own value or importance. -Emeasoba George

Self-Importance is synonymous with arrogance.

Self-importance by Emeasoba George June 9, 2018

Importantist

1.) The most important.
2.) At the top of the list of things filed 'important'.
3.) The most of the most.

I.E. "That point is the most importantist point I ever made. Check out this nine."

Importantist by Bella Ballerina June 14, 2010

importantest 

for when something is the most important thing

no i am the most importantest

importantest by ehae February 18, 2022