Macquarie Dictionary


Pull up your underdaks

We hope you’re wearing a clean pair, because this week we are discussing the unmentionables. Underdaks, also called underchunders or underdungers, is a colloquial name for your underpants. Daks are trousers, therefore underdaks must logically be underwear. Simple. 

Aussie slang is full of alternative words for our trousers and underwear. Reginalds or Reg Grundies are rhyming slang for undies, while bloomers are known as bum shorts in Queensland, and scungies in New South Wales and the ACT.  

Freeballing is a rather imaginative term for when a man forgets to wear underdaks beneath his daks. There are plenty of other, much ruder, words for underwear out there. We’ll leave those to your imagination (or a search of the Macquarie Dictionary Online).

For other fashion faux pas, pull up your grundies and check out our trackie daks blog.

Each week, we have a look at a slang word from Australian English. You can see other Aussie Word of the Week posts from the Macquarie Dictionary here.

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