two bob

noun3

1. •
   (Australia, slang) A 20-cent coin.
2. •
   [before a noun] (UK, Australia) A trivially small value.

   • Judging from the spectrum and the brightness Dr Stickland “wouldn′t give two bob either way”. — 1975
3. •
   (UK, no longer used) Two shillings; a florin.