Cancer vs. Woman

Listen up, dummy! The joke is that stage 4 cancer is being compared to a woman in a sexist way. It suggests that both are hard to beat, and even if you do, they'll come back. It's playing on the dumb stereotype that women are annoying and keep coming back, even when you think you've gotten rid of them. As for you, you can't beat anything, but you also can't make anything either.