Dumber Than a Bag of Hammers 

Speachless.

As unvocal as a stationary sack of primitive kinetic fastening implements

"My neighbor's chihuahua bothered me, so when they were on vacation I absconded with it, anesthesized it, removed the offending throat organ, and bribed the housesitter to keep her mouth shut. Now it is dumber than a bag of hammers and my neighbors are slightly puzzled."

Dumber Than a Bag of Hammers by UDPseudonym001 May 3, 2020

dumber than a sack of dirty underwear 

Can be said about someone seriously lacking brain activity.

Me- You'll never believe what Lil Kurt did today!
Evil Tim- What did he do? Did he try to marry a donkey again?
Me- No, it's even more idiotic than that... the boy tried to launch himself into orbit by supergluing some Roman Candles to his butt! He's in the hospital now for severe rectal burns.
Evil Tim- Man, he's dumber than a sack of dirty underwear...

dumber than a sack of dirty underwear by Shawn B. January 15, 2007

Dumber than a bag of dicks 

Stupid

She was "dumber than a bag of dicks" when she drove around drunk because that is stupid.

Dumber than a bag of dicks by Les mcclary February 24, 2019

dumber than a bag of wet mice 

Something or someone that is profoundly stupid or ridiculous,

Person one: The new Windows 8 operating system is so cool,

what do you think?

Person two: That statement is dumber than a bag of wet

mice,

Windows 8 is dumber than a bag of wet mice,

in fact YOU'RE dumber than a bag of wet mice

for sayin that!

Person one: You got really worked up about that.

Person two: I was just demonstrating what an awesome

phrase that is.

Person one: Well I think that that phrase

is dumber than a bag of wet mice!

dumber than a bag of wet mice by THESWORDMASTER January 7, 2013

Dumber than a Box of Rocks 

That guy name Jake from Rocket League

Jake is dumber than a box of rocks on any game we play

Dumber than a Box of Rocks by Thatboiinblue February 23, 2021

dumber than a bag of rocks 

where an individual that is really off and not quite there yet with the rest of his population.

you are "dumber than a bag of rocks"

dumber than a bag of rocks by youpapa420 February 28, 2022

Dumber than Easter 

An obviously stupid event, person, place, or thing.

As George Carlin would say: "dumber than a second coat of paint".

Transubstantiation? Jesus Christ, that's Dumber than Easter!

Gift 700 Billion dollars to Wall Street Bankers to save the economy? Jesus Fucking Christ, that's Dumber than Easter!

Sarah Palin? Jesus Motherfucking Tittysucking Rollerskating Cocksucking Christ with hard-on, that bitch is Dumber than Easter!

See DUMBER THAN A SACK OF HAMMERS

Dumber than Easter by Charlie Bravo April 6, 2010