Satoshi Millionaire is one, who has 1 million Satoshi, i.e. 0.01 BTC.
There was a time when new entrants wanted to reach goal of 21 BTC, i.e. one in a million. Then it became Satoshi Billionaire, i.e. 10 BTC. Then 21 million club, i.e. 1 BTC. Now, owning 1 BTC is difficult and being a Satoshi Millionaire is the new goal.
To have 1 Million satoshi is very difficult now. Especially the BTC price goes up.
What a pity and sad to remember that in those years the price of 1 Bitcoin was around 200 $ to 300 $ and it was very easy to earn 0.01 BTC on faucet sites.