know no more about (something) than a frog knows about bedsheets

To know absolutely nothing about something. Primarily heard in US. I don't know why Uncle Tony left the farm to Albert. He knows no more about farming than a frog knows about bedsheets! Oh, give it a rest. You know no more about running a business than a frog knows about bedsheets, so stop lecturing me.
See also: bedsheets, frog, know, more, no
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

know no more about something than a frog knows about bedsheets

Rur. to have no knowledge of something. Don't let Bill fix your car. He knows no more about cars than a frog knows about bedsheets. When I first started studying French literature, I knew no more about it than a frog knows about bedsheets.
See also: bedsheets, frog, know, more, no
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
Summary: Nashik (Maharashtra) [India], Aug 19 (ANI): Nashik Civil hospital's Special Newborn Care Unit (SNCU) is using colour-coded bedsheets for each day of the week to protect the newborns from getting any infection.
Claudia Winkleman says she often goes to bed with a full face of make-up, finds filthy bedsheets a turn on, and says she picks eyeliner over food essentials when she pops to the supermarket.
"They are very small and their eggs are laid in places where the pest controller may not reach them near curtains and under bedsheets. In these cases we need the residents to work with us.
Will Brexit force up to start tie dyeing the bedsheets again?
It can spread through close skin contact or sharing bedsheets, towels or toothbrushes - or touching contaminated items.
It is further stated that the project: 'Cluster Council for Bedsheets and Upholstery (CCBU)' was also handed over to BZU with the principal understanding of using the CCBU machinery for the training of students and absorbing its staff as permanent employees.
The shipment was declared as packages of blankets, bedsheets, pillowcases, carpets, and caps but was found to be used blankets, bedsheets, pillowcases, scarfs, socks, pants, jackets and shirts with a total value of P3,685,854.06 and total duties and taxes of P1,274,415.26.
Pakistan Bedsheets and Upholstery Association (APBUMA).
Pulling from her collection of about 50 mirrors, she creates analog collages by positioning them to produce reflections against everyday backdrops: tiles, asphalt, bedsheets. Subjects include her feline companion, Peach, as well as flowers, and parts of her body, though rarely her face.
As part of the CSR initiative, 300 pieces of blankets, duvets, bedsheets and pillow cases were donated to the charity, which was founded in 1990.
On hearing the "news" contestant Darren Day burst into Gest's room and lifted his bedsheets to check he was alive.
Rome, Jumada I 6, 1437, Feb 15, 2016, SPA -- Authorities have put up roadblocks around the Italian capital after two prisoners escaped jail by sawing through bars and using knotted bedsheets to climb over the wall.
Conversely, the striped paintings registered as objects--some of them flags, some hanging like bedsheets, others tied in knots.
Bedsheets are among the more popular items used in suicide attempts.