Cockcertain 

Like cocksure, but more so.

Byron isn’t even cocksure, they are cockcertain.

Cockcertain by Phenobabydoll February 17, 2020

concertainty 

A way of spelling the word "concerned" to scare people who have Hippopotomonstrosesquippedaliophobia.

"they look concertainty upon laying their eyes on the dead body.."
"What?"
(guy with Hippopotomonstrosesquippedaliophobia) "AHHHHHHHHHHHHHHHHHHHHHHH"

concertainty by kid who likes dani September 22, 2023