deetdahdee 

an idiot, loser, dork

"Two plus two equals four not 897! What a deetdahdee!"

deetdahdee by break.your.smile October 17, 2008

deetdedeet 

Someone who’s acting particularly dumb or stupid.

Brian’s such a deetdedeet!

deetdedeet by chrisjamalevans January 15, 2021

deedadeet 

“Deedadeet” means dumbass, or stupid.

Someone: “hey look at that deedadeet’”

Someone 2: haha they are such a dumbass.

deedadeet by Catsrsooniichannn February 14, 2023