These stupid acronyms drive me nuts. It's rude to not at first, in this case declare "stand up paddle board" and thereafter "SUP". Preferably in the title, and then first time in the text. Got nothing against "CD" (car dude) but why do so many do this. It's obvious lots of people won't know what it means. But it continues. Perhaps it makes people feel youthful ??? I don't even know if acronyms are a youth thing but I'm sure retirement age people don't often use acronyms in this way. I think I'll just continue to ignore posts that revolve around acronyms. Like this one occasionally I'll click on just to see what it means. But often I have to read many posts to figure it out. One thing's for sure .. using acronyms indiscriminately is not a plus for good communication.