Jizzy Jazz

Listen up, buttercup! So, the joke is that someone is talking about having "jizzy jazz" all over their backside. "Jizzy jazz" is a slang term that refers to semen, implying a sexual situation, which is funny because it's crude and unexpected. I know you don't get out much, living in your mom's basement and all, but trust me, it's funny (to some people at least).