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dumber than a bag of hammers

Exceptionally stupid. You thought you could fix the washing machine on your own, so you just started pulling it apart? I swear, sometimes you are dumber than a bag of hammers. I used to think that kid was bag of hammers in school, but he grew up to be a particle physicist.
See also: bag, dumber, hammer, of

dumber than a doornail

Very stupid. You took apart the entire washing machine just to unblock the pump? I swear, sometimes you can be dumber than a doornail, Larry. I used to think that kid was dumber than a doornail, but he turned out to be a physicist.
See also: doornail, dumber
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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References in periodicals archive ?
'Were these Umno indignities and humiliations a vindication of what Mahathir said about Umno branch leaders become 'dumb and dumber' or was Zahid parroting what DAP was telling him - as if DAP is not only directing Mahathir but also directing Zahid as the grand puppet-master in Malaysia?
The Internet Movie Database, or IMDb (http://www.imdb.com/title/tt2096672/?ref_=ttcrv_crv_tt) rating for "Dumb and Dumber To" is 6.7/10 from 20,192 users as of this writing.
Technical credits are rough and ramshackle, but if you wandered into "Dumb and Dumber To" to study the cinematography, the joke is clearly on you.
The closest comparison to ''Dumb and Dumber To'' might be 1998's ''Blues Brothers 2000,'' made 18 years after the original.
"Some people have had the mistaken notion that in order to make the server smarter, you need to make the client dumber," Gates said.
"UCAVs ate dumber than dirt," he told a research conference in Washington, D.C.
Jamie, of High Avenue, Haden Hill, Cradley Heath, was copying a scene in the Jim Carrey and Jeff Daniels hit comedy Dumb and Dumber in which Daniels licks the pole of a ski lift - and is stuck to it.
Take Dumb and Dumber. I had the misfortune of being asked to review this imbecilic flick.
Now I'm not sure which piece of pundit psychobabble is dumber, this or the notion that the inequitable distribution of wealth is a mass delusion based on a newly identified pathology called "entitlement mentality." The real pathology is "pundit arrogance"--an affliction that results when a really big, fat paycheck, complicated by a solid dose of male privilege, prevents you from understanding facts or seeing everyday people's lives.
The firm was behind the movies Wolf of Wall Street and Dumb and Dumber To, at least the first of which was allegedly funded using the misappropriated funds.
ISLAMABAD -- A family was killed after a dumber hit their motorcycle on Friday, police said.
City Chiniot police have registered a case against dumber driver.
DUMB AND DUMBER TO (15) Starring: Jim Carrey, Jeff Daniels, Kathleen Turner, Laurie Holden, Rob Riggle, Rachel Melvin, Steve Tom, Don Lake, Patricia French, Bill Murray Directors: Bobby and Peter Farrell Duration: 109 mins THERE'S no shortage of dim-witted and empty-headed characters on the big screen.
Dumb and Dumber To 109mins 15 JUST how amusing you find this comedy sequel from the Farrelly brothers depends on how funny you find the idea of grown men farting.
The dimwitted Lloyd (Jim Carrey) reminds the audience of that simple fact minutes into "Dumb and Dumber To,'' and the sentiment echoes throughout the disappointing return.