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

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.

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.
See also:
  • bedsheets
  • know no more about (something) than a hog knows about Sunday
  • know no more about (something) than a pig knows about Sunday
  • know no more about than a frog knows about bedsheets
  • I know
  • closed book, a
  • a closed book
  • as we know it
  • as you know
  • be in the dark