"Unidentified Aerial Phenomena". Sometimes instead "Unexplained Aerial Phenomena".

A visual stimulus that provokes a sighting report of an object or light seen in the sky, the appearance and/or flight dynamics of which do not suggest a logical, conventional flying object, and which remains unidentified after close

scrutiny of all available evidence.

Basically a newer term for UFO, but meant to imply a higher degree of validity.
"There’s a new name. It’s unexplained aerial phenomenon, UAP. That’s the latest nomenclature.” —Hillary Rodham Clinton
via giphy
by jadepraerie September 27, 2017
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ugly ass poodle, a uap is a teacher or someone old and they say there some different type of ethnicity and has a fuckin ugly ass hair-do (like a poodle)
"yo Ms.DuBois (teacher) is a fuckin uap"
by VaLLeJo THiZzin' May 06, 2005
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