Green’s Dictionary of Slang

wattle n.²

[rhy. sl.; wattle and daub = warb n. (2)]

(Aus.) a dirty, grubby person.

1918		C.J. Dennis ‘Cow’ in Backblock Ballads 35: Them there rhymers uv the wattle! An’ the bardlet uv the bottle.
1959		Baker Drum.