(Australia, informal) An imagined or symbolic time when assumedly unsophisticated people from the bush come to the city, likely to be preyed on by tricksters there.
What do you think this is, bush week? (= What do you take me for? ; Do you think I'm an idiot?)
Origin of bush-week
- Apparently from an actual attempt to organise a Bush Festival in Sydney in 1919; the idea then being extended to the present figurative use.