I keep imagining OP getting pissed af, IM NOT YOUR DAD!! STOP CALLING ME DAD, SOMEONE MIGHT TAKE YOU SERIOUSLY AND THEN WHAT?!?!?
Chill out pops, really not that big of a deal. There is no ending it as you have allowed it to go on for far too long, you could of ended this easily in the beginning. Kid says that you're his father, you kindly explain to him although you sleep in the same bedroom as his mom, you are not the biological father. But because it has been going on for years, embrace it and make it funny in a less insulting way. Or, and this one is far fetched...maybe try a different court?
There's a "pops" at every park probably. It either comes from someone bringing along his son and everyone picks up on calling him that, or he's just an older man. We got a pops at our park, his son is pretty good and so is he. Think Jason Kidd smarts without the height or athleticism (yes Kidd had some lol).
True back in the day there was this 50 yr old white guy exactly 6'0 and he used to give everybody the business. I cringe thinking how elite he was back in his prime because this dude had complete offensive game
I remember seeing a dude like that playing pickup at my school gym. He was matched up against one of my friends, and even though he had next to no speed/athleticism left, his repertoire of post moves was insane.