A Bitcoin OG is like the godfather of crypto - they've been around since the early days, they've seen some shit, and they have the scars (and the Lambos) to prove it.
Bitcoin OGs are the ones who were miningBitcoin on their old Dell laptops back in 2010, the ones who remember when Mt. Gox was the only game in town, the ones who have been through more bull and bear cycles than a rodeo clown.
They're like the grizzled veterans of the crypto world, and they've got the HODL tattoos to prove it.
Example
"I ran into this Bitcoin OG at a conference the other day. He had so many war stories, I felt like I was listening to a podcast."
"You think you've got diamond hands? Talk to a Bitcoin OG - they've been holding since before you were born."