Play the video even if you do not like Steve.  (I cried when I heard that he died)  Anyway, he is perhaps the world's best-loved Aussie (pronounced Auzzie), and the song is Aussies best-loved song.  It could be called their unofficial national anthem.  Most Aussies know all the words to "Waltzing Matilda",  but not the words to their national anthem.  Swagman or swaggie = bum or gypsy; Billabong = oasis or watering hole; Coolibah tree = a species of  tree; Billy = pot of water for cooking; Jambuk = sheep; Tuckerbag = bag for carrying belongings; Squatter = landowner; Troopers = police or sheriffs