Where does the saying "I wouldn't know the bloke if he stood up in my soup" come from?

Question

I've been watching the Australian movie "Gettin' Square" again, where some character uses this expression to indicate he really, really had never heard of the person in question.

Is that an Australian saying, or where does it come from?

Answer 1

well it's NOT american... i guess that narows it down a bit lol! good luck

Answer 2

it;s a quote from a movie and people use it over again.

Answer 3

Why don't you ask the word detective? ;)