dumb rocks 

Rocks that are abnormally lacking in smarts.

"I didn't think it was possible, but that rock is dumber than most."

dumb rocks by Lord_D October 21, 2004

Dumb as rocks 

Referring to someone that has no intelligence. No common sense. Someone who is just dumb, as rocks have no intelligence.

Neil: Dude you gotta check out this new car I got!!
Bob: What kind of car did you get??
Neil: A black one, it's awesome.
Bob: (thinks to himself; "this dude is dumb as rocks.")

Dumb as rocks by cpetkunas June 30, 2020

Dumb as a bag of rocks 

Extremely dumb.
Popularized on " The Big Bang Theory".

All the guys I knew growing up were as dumb as a bag of rocks.

Dumb as a bag of rocks by Judge dredd7 November 17, 2011

Open your door or I'll throw rocks through your window you dumb whore 

Dr.Phil, you uncultured swine

Open your door or I'll throw rocks through your window you dumb whore.

Open your door or I'll throw rocks through your window you dumb whore by Dr.Phil(the cool one) July 20, 2022

dumb as a box of rocks 

See "dumb as a bag of rocks" ... my deceased dad used to use the term alot.

You're about as dumb as a box of rocks ... /duh!

dumb as a box of rocks by Hippy420Lover53 May 14, 2018

dumb as a rock 

Terminally stupid.

The perp was dumb as a rock, and confessed in five minutes.

dumb as a rock by Octopod November 8, 2003

Dumb ass a rock 

Dumb as a rock combined with asshole and increased stupidity.
Most of people of this category do not understand the difference between Dumb as a rock and Dumb ass a rock

Guy 1: Your mom is as dumb as a rock.
Guy 2: Nope. She is ass dumb ass a rock.

Dumb ass a rock by Jekr December 10, 2018