They asked JFK Jr. if he wanted to shower before his flight. He said, "No, I'll just wash up on shore!"
Washing Up
Explanation
Explain Bear
Listen up, nimrod. This joke is based on the fact that JFK Jr. died in a plane crash where the plane went down in the ocean. When he says he'll "wash up on shore," it's a dark reference to his body washing up after the crash. You probably think irony is just wrinkling your clothes, huh?