"Galah" is also derogatory Australian slang, synonymous with 'fool' or 'idiot', this is because the Galah looks a bit foolish on land, an unfair simplification. Because of the bird's distinctive bright pink, it is also used for gaudy dress. The word comes from the bird of the same name, because of its antics and the noise it makes; often intensified as flamin' galah!.
A famous user of the slang "galah" is Alf Stewart from Home and Away who is often heard saying "Flaming galah!" when he is riled by somebody.