[Jedi Master Pikachu]

Can you explain the German phrase? You’re translation was helpful, but it still (personally) doesn’t make much sense with the rest of your post.

[wolf78]

It's something you say when somebody bases his argument on absurd hypothetical. E.g.: "I'm not lazy. If my parents had given me proper emotional support as a child, I would be a millionaire by now.". The answer would then be: "Boo-Hoo, if cowsh*t were butter, farmers would all be millionaires!".

Meaning: If you're allowed to randomly change the premises of your argument, you can claim anything, even the biggest nonsense.