Definition of dolly tub in English:

dolly tub

noun

historical
  • A washtub.

    • ‘Most of the room was taken up by a large pair of wooden mangles and a dolly tub.’
    • ‘The allusion is to dolly-pegs and a dolly-tub, used for washing.’
    • ‘My mother washed all our clothes at home, in the copper boiler, or in a dolly tub complete with scrubbing board.’
    • ‘Cauliflowers, onions, potatoes, radishes and lettuces can be found growing from old pig troughs and dolly tubs.’

Origin

Late 19th century: from dialect dolly (used as a term for various contrivances thought to resemble a doll in some way) and tub.