A person who is related to Danny Devito and i love them
Nick: Omg you’re such a Dan Dan
When you poop into the belly button of someone with a Herina.
"Dude! What the fuck is that?"
"That's my Dan Dan, man."
Something that was very impressive but ultimately down to luck and very unlikely to happen.
"wow, that was a proper Dan-Dan, I can't believe you managed to cheese that 250k high score David"