know as much about (something) as a pig knows about Sunday

To know absolutely nothing about something. Primarily heard in US. My uncle bequeathed the farm to me when he passed away, but I knew as much about running a farm as a pig knows about Sunday! Oh, stop lecturing me. You know as much about running a business as a pig knows about Sunday!

See also: know, much, pig, Sunday

See also:

know as much about (something) as a hog knows about Sunday
know as much about as a hog knows about Sunday
bedsheets
be on the danger list
be on/off the danger list
be off the danger list
(as) crazy as a bedbug
bedbug
crazy as a bedbug
bequeath to

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