- (now chiefly Australia and New Zealand) A fuel metering/delivery pump at a filling station.
- A road vehicle (often a trailer) for the transport of liquid fuel, particularly aviation fuel at an airfield.
- (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.
- (Ireland, slang, used in the vocative) A derogatory term of address for a person similar to buffoon or imbecile.
From Bowser (“a surname”), after Sylvanus Bowser US inventor of the first fuel pump; also a trade name of SF Bowser inc., the inventor's company.