I learned about this word today too. It stands for 'Joy Of Missing Out".
You were thinking of buying a coin and later that coin dumps to oblivion. That's JOMO!
The joy of missing out is always a great one and can bring more profit to businesses. As a trader, joy of missing out can bring a perfect shot that will bring fortune. I found remember a time I intended to buy a coin and due to sufficient fund I decided to wait and to my greatest surprise, the market falls then I began to have FOMO. I decided to wait again but price never waits for me.