AUSSIE ENGLISH - GALAH

A grey-backed, pink brested inland parrot, gregarious and noisy, destructive and useless, and considered to be 'as silly as a square wheel'.

Any human beings who possess these characteristics (particularly drivers of vehicles other than your own) are 'galahs'. Most human galahs are young. If their galah habits persist, they may graduate, and become dills, or nongs.