It's a typo for "put forth the codswallop". In fact, I didn't even notice that it was a typo until you pointed it out, since my brain autocorrected it as I was

It's a typo for "put forth the codswallop". In fact, I didn't even notice that it was a typo until you pointed it out, since my brain autocorrected it as I was reading. To put forth means "to offer an opinion; to argue for something". Codswallop is a rare, somewhat archaic slang term meaning, basically, "bullshit". Thus "to put forth codswallop" means "to argue for bullshit".