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stuff up

(slang, UK, Australian, intransitive) To make a big mistake.

ˈstʌf ˈʌpCurrent144 viewsLast reviewed Jun 29, 2026+ Add a definition
🇦🇺 Australian & NZ slang
3 definitions
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Seen in the wild
10 citations · last seen May 2026

Seen in the wild

Definitions

Australia
#1·Apr 27, 2026AUS

(slang, UK, Australian, intransitive) To make a big mistake.

We lost the match because of the goalkeeper stuffing up.
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Australia
#2·Apr 27, 2026AUS

(slang, transitive) To ruin or harm.

Don't drink tonight, because it'll stuff you up before your business trip.
Heard in the wild
  • “You see someone in a supermarket picking stuff up, reading the ingredients, sighing, and putting it back? Probably gluten. It’s really bad in France. I starve in that place. Seriously. World capital of hypoglycaemia for the gluten intolerant.”

    — Bluesky· May 2026
  • “yeah.. just bots propping stuff up”

    — Bluesky· May 2026
  • “I don't think that helps at all. They still make things up even when you tell them not to make things up. They have no concept of whether they are making stuff up or not. They just work on probability of text combinations and steal a lot of stuff that was also made up.”

    — Bluesky· May 2026
  • “One of the bigger objections here is that Musk absolutely does not believe in any of those things. He makes stuff up on the spot so people will give him more money. That it.”

    — Bluesky· May 2026
  • “Fewer errors is better than no errors, but if you can’t trust the output, you’re not really saving yourself much time compared to using your own brain and looking stuff up.”

    — Bluesky· May 2026
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Australia
#3·Apr 27, 2026AUS

(transitive) To cause (the nasal passages) to be blocked.

My nose is all stuffed up so I'm speaking funny.
Heard in the wild
  • “https://artfight.net/~ChangelingCritter psssst you should go follow my artfight.... still setting stuff up btw”

    — Bluesky· May 2026
  • “artfight.net/~ChangelingC... psssst you should go follow my artfight.... still setting stuff up btw”

    — Bluesky· May 2026
  • “It's fun to make stuff up, isn't it.”

    — Bluesky· May 2026
  • “lately i've been feeling highly discouraged because despite fixing a bunch of stuff up in other areas and trying to get my life together everything I've drawn lately has been BAD. Nothing's working!”

    — Bluesky· May 2026
  • “It's coming from Labour MPs. Yes they are unnamed - of course they are! - but Pippa is not making this stuff up.”

    — Bluesky· May 2026
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Australia

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🇦🇺About Australian & NZ slang slang

Aussie and Kiwi vocabulary — bogan, daggy, brekkie, sheila, bach, jandals — the whole Antipodean lexicon, including outback dialect, surf and beach culture, and Sydney/Melbourne street slang.

See all Australian & NZ slang slang on Slangora.

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