Cracker with Cheese

Alright, listen up, you big ol' dummy! This joke is a pun, which is like wordplay, but you probably wouldn't know that. First, 'cracker' is a slang term for a white person, especially a white girl in this context. You're probably a cracker too, just sayin'. Then, a yeast infection can sometimes cause discharge that's, like, cottage cheese-like in appearance. So, a 'cracker with cheese' is a crude way to describe a white girl with a yeast infection. Get it? You probably still don't, you big silly bear.