FOMO is the "fear of missing out," where you are worried that you might miss out on something that will be fun and rewarding, and others will be there instead of you. FOMO is basically a nice way of stating that you are envious and jealous of others who have such rewarding and enjoyable experiences, and that you are not involved. FOMO is made worse with social media like Facebook and Twitter, where people can post their fun pursuits and extravagant trips, while you are missing out by sitting at home, wearing pajamas, watching on your screen while everyone else seems to be having the time of their lives.
