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Related to adder: puff adder, Full adder

deaf as an adder

Unable to hear anything. The deafness of an adder is referred to in the Bible. A: "I'm shouting, and he's ignoring me!" B: "Oh, he's deaf as an adder! Write down whatever you're trying to communicate to him." What are you, deaf as an adder? You hear me calling you for dinner, so get in here!
See also: adder, deaf
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

*deaf as a post

deaf. (*Also:as ~.) When my cousin was a teenager, she played her drum set without ear protection, and she was as deaf as a post by the age of twenty-five. Mark can't hear you even if you shout; he's deaf as a post.
See also: deaf, post
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

deaf as a post

Also, deaf as an adder. Unable to hear or to listen, as in Speak louder, Grandpa's deaf as a post. The first simile has its origin in John Palsgrave's Acolastus (1540): "How deaf an ear I intended to give him ... he were as good to tell his tale to a post." It has largely replaced deaf as an adder, alluding to an ancient belief that adders cannot hear; it is recorded in the Bible (Psalms 58:3-5).
See also: deaf, post
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

deaf as a post

If someone is as deaf as a post, they are very deaf. My Dad is as deaf as a post.
See also: deaf, post
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

deaf as an adder (or a post)

completely or extremely deaf.
The traditional deafness of an adder is based on an image in Psalm 58:4: ‘the deaf adder that stoppeth her ear’.
See also: adder, deaf
Farlex Partner Idioms Dictionary © Farlex 2017

(as) deaf as a ˈpost

(informal) unable to hear anything: You’ll have to shout if you want her to hear you. She’s as deaf as a post.
See also: deaf, post
Farlex Partner Idioms Dictionary © Farlex 2017

deaf as a post

Unable to hear or to listen. The simile dates from the sixteenth century, when J. Palsgrave wrote (Acolastus, 1540), “He wotteth ful lyttel how deffe an eare I intended to gyue him . . . he were as good to tell his tale to a poste.” It caught on and has survived to the present, outliving such similes as deaf as an adder (first recorded in the Book of Psalms, 58:4–5), deaf as a beetle, and deaf as a white cat. See also fall on deaf ears; turn a blind eye/deaf ear.
See also: deaf, post
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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References in periodicals archive ?
"Owners must contact their vet immediately if they suspect their dog has been bitten by an adder." Marley's narrow escape comes weeks after a German Shepherd died after being bitten by an adder in Kirkintilloch and Vets Now reports seeing a 208% year-onyear increase in the number of pet owners seeking advice about adder bites.
"Adders are secretive animals and prefer to slither off into the undergrowth than confront and bite humans and domestic animals; most attacks happen when they are trodden on or picked up.
De Adder tweeted that he would bounce back from losing the job and that he just had to "recoup a percentage of my weekly income."
WHERE IN WALES HAVE THERE BEEN REPORTS OF PEOPLE GETTING BITTEN BY AN ADDER? A warning was issued this week about snakes lying in long grass after a woman was bitten by a snake on a visit to Llangennith to go surfing with her partner.
Commenting on what the team plans to do with the tens of thousands of dominoes lying in carton boxes, Saatvik said, 'Our team has decided to donate some of the dominoes to our elementary school to help students learn some simple adders.
Table 1 presents the logical table of a full adder. In latest nanotechnology, study on the architecture of nanoscale full adder is considerably enlarged particularly in the QCA [22, 23].
The berg adder (Bitis atropos) is a relatively small snake (one of the dwarf/minor adders), with an average adult length of 30-40 cm.
GDI based full adder was verified successfully using SPICE code.
A resident at Fazeley, near Tamworth, reported seeing a snake that may have been an adder in her garden.
READERS with long memories will remember me joking about becoming parliamentary champion of the adder.
The reason is that, in contemporary reconfigurable systems (such as Altera and Xilinx FPGA families) fast carry chains [5][8] are available, which provides high performance in carrypropagate adder schemes.
Jamie Adkin has been promoted to Vice President Sales EMEA at Adder Technology.
To sum the results of 1 x 1-digit multipliers, a fast carry-chain decimal adder was also proposed in [18].
Adder Technology, a high performance KVM (keyboard, video, mouse) specialist, has launched the AdderLink XDIP, the latest solution in the company's AdderLink KVM and AV extension line, the company said.
* Adders: Everyone should be an adder in their friendships!