Top Definition
Acronym: Fear of Being Left Out

Anxiety caused by knowing that friends are planning something (like an outing, party or wedding) and you won't be invited, or nobody will remember to tell you about it. This causes one to reach out to everyone attending to make sure he/she is not forgotten.
Barbara was calling, emailing and texting everyone to say "hi" but they all knew she just had FOBLO and wanted to go to the party.
by Sarcastinator July 11, 2011

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