When a company decides to market a product under a name that is a parody of another mark, it is engaging in trademark parody. Trademark parody is almost always a bad idea, for two reasons. This means that the parodist is picking on a company rich enough to finance a trademark-infringement lawsuit out of its petty cash. And since the passage of the Trademark Dilution Act, suits for dilution are easier for owners of famous marks to file and win. Another factor in trademark parody that often contributes to the problems that parodists face is that the parodied mark is often the butt of a joke, which may be an off-color joke.
Nobody likes wise guys.
The owners of the parodied mark may be so enraged by the parody of their mark that they will rush to file a trademark-infringement suit and ask for an injunction against the parodist. Courts are usually sympathetic to the interests of the owners of famous trademarks. As a result, trademark parodists are routinely enjoined from pursuing their bad jokes at the expense of the well-known marks they parody. You can understand trademark parody better by considering a few trademark parody cases in which a court ordered the parodists to give up making jokes at the expense of the trademark owners. Not surprisingly, all these parodists lost in court.