A Booner is usually considered a person of low social order from Canberra, ACT, Australia.
Similar in character to Westie or Bogan.
Booners are usually associated with the local car festival Summernats or souped-up cars in general. Often dangerous driving behaviour (such as burn outs or drag racing) normally associated with rev heads or hoons will earn somone the title Booner.
Sometimes used to refer to a car enthusiast of any social order.