- abbreviation for "fear of missing out": a worried feeling that you may miss exciting events that other people are going to, especially caused by things you see on social media
- "Don't get FOMO. Get a ticket now!"
- fear of missing out (FOMO) is the feeling of apprehension that one is either not in the know or missing out on information, events, experiences, or life decisions that could make one's life better
Source: Wikipedia + Cambridge Dictionary