Anxiety you may feel on a Friday night, slangily

• Social media anxiety, for short
• Acronymic distress about being excluded from the fun
• Anxiety about being excluded from the fun, for short
• Angst about not having fun, in modern lingo
• Anxiety about exclusion, for short
• Anxiety spelled out by the starred answers' starts
• Acronymic anxiety about being excluded from the fun
• Feeling that everyone's having fun without you, in modern lingo
• Anxiety associated with using Snapchat, briefly

Wikipedia Word definitions in Wikipedia
FOMO is the 2011 album by New Zealand artist Liam Finn . The title is an abbreviation for the term 'Fear Of Missing Out'.