Green’s Dictionary of Slang

1. a tough, but isolated and backward country-dweller.

1951		D. Stivens Jimmy Brockett 77: Ziegler had laid all the known Australian wrestlers among the sweet peas and new blood like this woop from Gosford was the only hope.
1999		P. Temple Black Tide (2012) [ebook] Anyway, this McCurdie. Bit slow but then a lotta the Woops only got one gear forward.

2. a simpleton, a ‘hayseed’.

1939		Franklin & Cusack Pioneers on Parade 73: Don’t be such a woop.
1941		Baker Popular Dict. Aus. Sl.
1955		N. Pulliam I Travelled a Lonely Land (1957) 242/1: woop-woop – remote, isolated place. used like our ‘the sticks’, ‘the end of nowhere’. woop-woop town – most rustic place of any. woop – one who comes from there.