FOMO - Fear of missing out.
For me, it was actually this year. I actually looked for a $pepe coin around January, because of my love for Pepe Lore memes and couldn’t find anything. Now I missed out on a meme coin of a lifetime.
I think you don't understand the FOMO term / slang in crypto. You didn't FOMO just because you missed in buying a coin. FOMO is when you buy a coin that is going uptrend on a rush because you don't want to buy it on a higher price, Also without having that much knowledge on it. You simply just missed buying that coin which did go very high on this month, it's a big missed and I'm sure there's a regret in your mind not buying it. This case happened all the time and I'm sure that you are not the only one who missed buying that coin.