Definition of FOMO
FOMOs
informal : fear of missing out : fear of not being included in something (such as an interesting or enjoyable activity) that others are experiencing Probably nursing a massive case of FOMO. That's what they're calling it these days: FOMO—Fear of Missing Out. Kids use the term to express concern about missing parties featuring phosphorescent pacifiers and music that can be heard all the way from Neptune. — Martha Beck, O: The Oprah Magazine, June 2013
From the M-W Editors
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First Known Use of fomo
2004
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