I had a clown for breakfast

I have been quite a long time in Switzerland but I still learn new things, especially sayings. Today I learned that if you're funny you say that you had a clown for breakfast. Huh? Personally I think that a German with a sense of humour is just as rare as eating a clown...but that's me. Also, if you say that you had Tarzan for breakfast you have behaved macho. You Jane, me Tarzan kind-of-thing. No wonder Germans are hard to understand... PS. Does it work in Swiss German?