Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym ONNTA is...

ONNTA is

  • Oh No, Not This Again

ONNTA is also in:

Acronym Definition Searched: CDIC WMSM OOP NE SSMI TT IWPA BCR PHG QAH? GOMSFE AASG EDLP RIR MSCVMA