bowser

noun4

1. •
   A road vehicle (often a trailer) for the transport of liquid fuel, particularly aviation fuel at an airfield.

   • The bowsers then go out to the aircraft and supply them with petrol. — 1962
2. •
   (UK) A mobile water tank deployed to distribute fresh water in emergency situations where the normal system of piped distribution has broken down or is insufficient.

   • The water bowser needed filling. — 2000
3. •
   (Australia, New-Zealand) A fuel metering/delivery pump at a filling station.

   • In those days bowsers were unknown and it was a case of buying a tine where you could. — 1933
4. •
   (Ireland, slang) A buffoon or imbecile.