dumbfoo 

A person who is dumb and is a fool. Smash them together and they create, DUMBFOO.
Pronounce: Dumb + fu

You got a F minus on your math exam!!! You're such a dumbfoo!

dumbfoo by Emma-NEM February 8, 2021

Dumbfounded 

Someone who is so utterly confused about every little thing said to them.

Joe: “have you seen my homework papers?”
Karen: “we have homework?”
Joe: “Yeah, where are my papers?”
Karen: “WE HAD PAPERS?!”
Joe: “Jesus lord..Why are you so dumbfounded all the time..”

Dumbfounded by Carlss..anthem December 31, 2019

dumbpoos 

Something you yell at someone who has shown and/or proven themselves to be a complete fucking dumbass. Usually used to humiliate the person.

Kouhei: What band is this?
Dave: The Lawrence Arms.
Kouhei: This band is lame. Orange Range is way better!
Dave: DUMBPOOS!

dumbpoos by daveteamassface March 9, 2007

dumbfoundead 

the sickest korean american rapper/freestyler to ever exist on planet earth.

Dumbfoundead - "Call me YouTube's Lebron James. I'm shootin' for the stars and my bullets go long range. I have the heart of Avatar and battle scars to prove it. Y'all just opened up a can of worms and I'm a start to lose it. Got a bigger brain than Lil Wayne, make Drizzy sound like Lil Zane, make Eminem sound simple, and throw Kanye out the window pane. I don't mean no disrespect, recognize this kid is next."

dumbfoundead by starfromadifferentgalaxy April 24, 2010

Dumbfoolery 

Dumb behavior.

That's enough of your dumbfoolery.

Dumbfoolery by Leif33 November 30, 2021

Dumbfoiled 

Made famous by the "Daily Show's" report on the yuletide log TV channel in Victoria, BC, Canada. Instead of correctly expressing his disbelief as "dumbfounded," the less than intelligent interviewee used the term "dumbfoiled," giving added evidence that his claim (the yuletide log resembled an actual fire) was completely ridiculous.

Ed Robinson: "The children come running down the stairs yelling 'Fire! Fire! Fire!' so, we all looked at each other dumbfoiled."

Steve Carell: "Alright, so you were dumbfoiled. What happened next?"

Dumbfoiled by mr.bojangles4251 December 16, 2011

dumbfoundedly 

The adverb form of dumbfounded.

The man stood quite dumbfoundedly, as he was informed that the word dumbfoundedly is, indeed, not a word used in proper english.

dumbfoundedly by Doctor Wolfington January 27, 2005