What Do Australians Call Underwear? Aussie Slang Explained

Aussies have a habit of giving everything a nickname. It’s part of what makes Australian culture so colourful and easy-going. Whether it’s shortening words or tossing in a bit of rhyming slang, there’s always a cheeky term for just about anything.

And yes, even underwear.

If you’ve ever wondered what do Australians call underwear, you’re in the right place. Aussies don’t just say "underwear" — they've got all sorts of fun, light-hearted ways to talk about it. So, if you're travelling Down Under or just curious, this guide will help you crack the code on Aussie undie slang.

Why Australians Love Slang

Australians don’t like to overcomplicate things. They’re laid-back by nature, and the way they speak shows it. Slang is part of everyday chat here. It keeps things casual, friendly, and a bit funny.

It’s also a bit of a national sport to make things sound lighter or cheekier than they really are. That’s why you’ll rarely hear an Aussie say “underwear” when “undies” will do the job. It’s faster. It’s funnier. And it keeps the mood light.

Popular Aussie Slang for Underwear

So, what do Australians call underwear exactly? Let’s break it down.

For Men:

• Reg Grundies (or Reg Grundys): This one's classic rhyming slang. "Reg Grundy" rhymes with "undie." Reg Grundy was an Aussie TV producer, but now his name lives on every time someone mentions their "Reg Grundies." So, if you hear, “I’ve gotta change me Reg Grundies,” now you know.

• Undies: Simple and sweet. It’s the go-to word. Works for both men and women.

• Jocks: Usually refers to men’s briefs. Think sporty, supportive, and straightforward.

• DTs (Dick Togs): An Aussie favourite. Technically, "Dick Togs" means tight swimwear, but Aussies sometimes use DTs when joking about tight-fitting undies. It’s a very tongue-in-cheek term — and very Australian.

For Women:

• Undies: Again, the all-purpose word. Aussie women use this just as much as the blokes.

• Knickers: Borrowed from the Brits but thrown around casually here. You'll hear it from mums, grandmas, and anyone trying to sound a bit old-school.

• G-string: Same as everywhere else, but often used in a playful way in Aussie conversations.

• Granny undies: This one's all about comfort. Big, practical underwear. Not the flashiest, but guaranteed comfy. Often said with a wink and a laugh.

So, next time you’re wondering what do Australians call underwear, you’ll know there’s more than one answer — and probably a joke attached.

Conclusion

Aussie slang isn’t just about words. It’s a big part of how Australians connect, laugh, and keep things light. Whether it's “Reg Grundies,” “jocks,” or plain old “undies,” there’s always a bit of fun in the mix.

And if you're looking to freshen up your own undie drawer, check out what Barramundies has to offer. No fuss. No frills. Just comfy, well-made undies Aussies would actually wear — whatever you wanna call 'em.