not know any more about (something) than a hog knows about Sunday

To know absolutely nothing about something. Primarily heard in US. I don't know why Uncle Tony left the farm to Albert. He doesn't know any more about farming than a hog knows about Sunday! Oh, stop lecturing me. You don't know any more about running a business than a hog knows about Sunday!

See also: any, hog, know, more, not, Sunday

See also:

bedsheets
can't say that I do
(I) can't say that I do
I know
a closed book
closed book, a
be not to know
get (all) torn up
ask me another
ask me another!

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