Dictionary Definition of hooahhooah (hoo ah) adj., adv., n., v., conj., interj., excla. (Orig. unknown) Slang.1. Referring to or meaning anything and everything except "no". 2. What to say when at a loss for words. 3. a) Good copy. b) Roger that. c) Solid copy. d) Good. e) Great. f) Message received. g) Understood. h) Acknowledged. 4. a) Glad to meet you. b) Welcome. 5. "Hell Yeah!" 6. a) I don't