boong /bʊŋ/ noun2 •(slang, offensive) An Australian Aboriginal person.I heard Bruce tell one of the drinkers he'd bought a place in Queensland where you could ‘still call a Boong a Boong’. — 1988 •(slang, old-fashioned) A native of New Guinea or Malaysia.A couple of boongs came down and carried me up to the hut where our R.A.P. corporal was. — 1943 formsboongs