(obsolete) A person employed to empty the contents of the outside toilet (i.e. human excrement) at suburban houses (and similar). Rendered obsolete by the introduction of plumbed (i.e. piped) sewerage systems.
The 'dunny' down the back yard was emptied by the council's pan man once a week.— Susan Marsden, essay Argyle, a port worker's home 19 Forbes Street Carrington New South Wales, describing 1920s way of life there