What are the Lupin III's fandom inside jokes?

So you know how every fandom has these inside jokes that have become their staple? Like House MD's fandom has "it's never lupus", Ace Attorney has "almost Christmas", Undertale has "I remember you're genocides" etc.

"These jokes may be unfunny and overused, but they're OURS" type jokes.

So, my question is, what are the Lupin III's fandom inside jokes? Share your favorite (or least favorite) below!