How to recognise a Budgie Smuggler

Oh dear;I love idiomatic language. You can do so much with it.

I don't know how to feel, therefore, discovering an expression I had never heard of until the other week. And it has currency as it was used in a sensis ad to illustrate this very point: that being an Aussie company they know the vernacular and netsurfers won't waste time sorting through irrelevant search listings that give the formal or literal meaning.

As it turns out, the definition is funny as hell. But I'll leave you to uncover it.