Best definition
WAIMOO?
Abbreviation: What Am I Missing Out On? A text-friendly quick-fire question when bored at home, anxious to socialise, but

without any inspiration to come up with any ideas yourself. Ideal if your phone allows you to add multiple recipients to a text message. Saves a great deal of time. This phrase is often used my people suffering from FOMO (Fear Of Missing Out).

(In a text message) “Dudes! It’s 3am on a Sunday! WAIMOO?”