Used to indicate a person who has such a large penis, that even when he gets some badly used up poon, it would be like having sex for the first time due to said large penis
Friend: That girl is a ho, I bet she was loose like a jellyfish?
Me: Au contraire, my dick is so big it was sloppy firsts to me.
Friend: What are sloppy firsts?
Me: Something you will never experience....