tap off

verb3

1. •
   To conclude an electronic ticketing process at the end of a public transport journey by holding a chipcard or a mobile device close to a terminal or reader

   • You need to tap on (that is, hold your Myki card against the card reader) on trams, but you don't have to tap off. — 2024
2. •
   To remove liquid or other particles from a furnace, keg, or other canister.
3. •
   To turn off by striking lightly.