dupidiot 

mixture of dumb, stupid and idiocy

Adam is a dupidiot. He tried to add water in his gas tank to save money.

dupidiot by Ed123456 August 19, 2008

dipidiot 

A cross between a dipshit and an idiot.

That dipidiot wouldn't know his ass from a hole in the ground.

dipidiot by Queen Sarcasm December 26, 2016

Dupiditious

(Adj.) Synonymous with the word dupid, it describes one who is exceptionally bad at activities involving shooting or PvP; one who lacks in basic intelligence; probed to crying.

"What a dupiditious boy!" Screamed Dumbledore, as Ron began to tear up.

Dupiditious by Miriam Webbster December 2, 2018