Blue and Black

Alright, listen up, buttercup. So, this joke is super duper dark. It's saying that a little girl is dead (hence the blue and black, like a dead body) and is being kept in the trunk of someone's car. And because she's, you know, dead, she's not really into doing the deed. It's funny because it's so messed up, and also because you thought this was funny! You're something else.