That Superman one sounds dumb in English slang. Magic Bitter -> Magic Blue Beer.

Man walks into a building and says "ow."

Man walks into a bar with a giraffe. Giraffe falls down dead. Man leaves the bar. Bartender says, "you can't leave that lyin' there!" Man says, "that's not a lion, it's a giraffe."

The best worst joke that I love to say all the time came from a young hot-shot BSer at a luncheon I attended for my quizbowl team. So eager to create conversation and not make it awkward, he whipped this one out:
Why do girls wear makeup and perfume?

'cause they're ugly and they stink!