Dumber than a rock on a bad day 

Dumber than a rock on a bad day, which would be dumber on the dumb scale compared to "Dumber than a rock".

Friend 1: Your dumber than a rock!
Friend 2: Your dumber than a rock on a bad day!
Friend 1: Shit.

Dumber than a rock on a bad day by jeffboi42 August 20, 2020

Dumber Than A Bag Of Hair

When somebody you know is dumber than a bag of hair.
A person consistently failing to understand anything you're saying.
When somebody is saying unintelligible nonsense.

1. He's Dumber Than A Bag Of Hair.
2. They're Dumber Than A Bag Of Hair.

Dumber Than A Bag Of Hair by Anthony Luka Davenport September 24, 2023

dumber than a box of retarded rocks

When being compared to a box of rocks would be an insult to rocks everywhere.

When being compared to retards would be an insult to retards everywhere.

Dude, you are dumber than a box of retarded rocks.

dumber than a box of retarded rocks by RabbiRob July 2, 2006

dumber than dog shit

Someone of low intelligence. A person who is so stupid you feel sorry for him. This type of person tries to sound intelligent but the truth is in reality they are dyslexic slow learners and can't even figure out how to achieve the basics of life. They are dumber than dog shit.

1. He couldn't add 2+2.. he's dumber than dog shit.

2. Rehmeyer sure attempts to make his posts sound intelligent but the truth is he's really dumber than dog shit.

dumber than dog shit by kr3493k February 14, 2008

dumber than owl shit 

Meaning less intelligent than the excriment of a flighted nocternal bird who feasts on small rodents and posses the capability of viewing 180 degrees.

People walking under downed power lines are dumber than owl shit.

dumber than owl shit by Chris Wollesen April 1, 2006

dumber than a sack of rocks 

A Southern idiom for someone who is beyond stupid.

Dave: I tell you Bobby is dumber that a sack of rocks.
Laura: Why?
Dave: I asked him to meet me outside the movie theater, and asked inside or outside.
Example2:
Clerk: Your total is $10.05 Do you have a nickel?
Bobby: No, only 5 pennies.
Clerk: You are dumber than a sack of rocks.

dumber than a sack of rocks by fml November 19, 2007

dumber than a bag of hammers 

when your cousin buford says somethin' REAL dumb and you turn to him tell 'im, "buford, you are dumber than a bag of hammers."

"buford, you are dumber than a bag of hammers."

dumber than a bag of hammers by rammymolnar May 14, 2020