Definitions by Rayzore

Oraa 

United States Marine Corps
Shouted out by Marines when given an Order
It’s an acronym

Orders
Received

And
Accepted or Acknowledged

Usually said quickly like a Barking dog
Phonetic OooHhhhRaaaa

“Marine send this sitrep to platoon leader “
Response “ORAA”

Oraa by Rayzore July 7, 2018