1. To embrace a simpler, more rural lifestyle, typically by leaving modern city life. My hippie sister really wanted to go bush, but I like modern technology too much to do that.
2. To go wild. The kids will go bush if you let them have all that sugar.
go bushleave your usual surroundings; run wild.
Bush in the sense of ‘wild, wooded, or uncleared country’ became current among English speakers during 19th-century British colonial expansion. In South Africa it may have been adopted directly from Dutch bosch .