A conservative economist Professor friend of mine (Who had a PhD as well) Told me the secret meaning of "PhD' is "Piled High and Deep".
He always chuckled when he said it. Never could figure out exactly "what" was "Piled High and Deep" and he only smiled and winked when I asked... ;-)
I have a friend who called and proudly announced, “I’ve finally received my Doctorate of Divinity”, I asked what flavor, peppermint, chocolate or strawberry. He hung up on me. His wife called back saying he got the hiccups, laughing laughing so hard.