LMAO! It just proves that Marines can adopt to local customs.
But what is a drongo, like a larger dingo?

FQ13
You!!!!!

From the Urban Dictionary:
1. Drongo
Dumbass, idiot
(Aussie slang)
"It doesn't go in the shed, ya drongo!"
2. drongo
a stupid, inept, dimwit or slow-witted person
"ya big drongo!"
3. Drongo
A person seemed to be, in some form or another, stupid. Drongo is a typically australian word and is part of common australian dialect.
Pass me that wratchet you Drongo
4. drongo
An Australian word, which is derived from a type of bird of that name (or so I'm informed) that lives down here. It was observed by the "Old Australians" as acting rather crazily, and thus an Aussie will call someone a drongo to say that they're an idiot. There are a number of alternative Australian pay-outs of this nature and calibre, such as clown, galah, wakka, minda, and many others.
"Scotty! What ARE ya doing, ya drongo?"
5. drongo
Australian slang: A "no-hoper" or fool. Derives from a racehorse of that name in the 1920's that never one a race out of 37 starts.
Recruits to the RAAF in WWII earned the nickname "drongos".
(Nothing to do with the class of bird -- drongo)
"You've really mucked that up, ya drongo!"
6. Drongo
fool to act in a stupid way to make your self a laughing stock
you bloody Drongo you have spilled my beer
7. Drongo
An Australianism or Aussieism for an unintelligent person, a loser, a halfwit or someone that is running on half a deck.
LOL! Did you see that drongo just do a linelock outside the police station? He is busted for sure.