It seems you're referring to a specific "12Yo Sawadie 43" write-up, though there isn't a widely recognized public document or viral article under that exact title in recent mainstream media.
The Koh Chang International Ocean Race is drawing massive attention not just for its star power, but for its significant prize pool. Athletes will be vying for a share of ฿1,000,000 THB 12Yo Sawadie 43
In competitive games like Valorant or CS:GO, players use "12Yo Sawadie 43" as a nonsense mic-spam. When a player is performing poorly, a teammate might sarcastically type: It seems you're referring to a specific "12Yo
If you can provide a bit more context or the name of the author/organization associated with it, I can take another look. I can take another look.