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Mabo

(AU, informal, legal) The High Court case Mabo v Queensland (No 2), which rejected the doctrine of terra nullius in favour of the common-law doctrine of aboriginal title.

ˈmɑboʊDocumented since 1930s1930sSilenthistorical280 viewsLast reviewed Jun 29, 2026+ Add a definition
🇦🇺 Australian & NZ slang
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Born ~1936 · no dated citations yet
1936BornToday, 2026

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Australia
#1·Apr 27, 2026AUS

(AU, informal, legal) The High Court case Mabo v Queensland (No 2), which rejected the doctrine of terra nullius in favour of the common-law doctrine of aboriginal title.

Origin: After Eddie Mabo (1936–1992), who began the case against the government. Compare Roe after the case of Roe v. Wade. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
For parents

Mabo refers to Eddie Mabo, the Australian Indigenous land-rights activist whose 1992 court case overturned the doctrine of terra nullius. Not concerning, just historical and political vocabulary. If your kid uses it constantly, ask them where they first heard it, not to police their speech but to understand which online community they are in. Most slang of this kind moves through TikTok and group chats, so seeing it in your child's vocabulary just means they are plugged into normal teen internet culture.

For ESL learners

Mabo is a proper noun referring to Eddie Koiki Mabo (1936-1992), an Australian Indigenous activist whose 1992 High Court case (Mabo v Queensland) overturned the doctrine of terra nullius. Use in Australian historical, political, and legal contexts. Formal equivalent: "the Mabo decision" or "Eddie Mabo." Common non-native mistake: confusing with general slang. Mabo is a specific historical reference. Read or listen to the word in context several times before trying it yourself; the right register is harder to learn than the dictionary meaning.

Heard in the wild
  • “12. **[^](https://en.wikipedia.org/wiki/Mabo_v_Queensland_(No_2)#cite_ref-12 "Jump up")**Russell, Peter H (2005). _Recognizing Aboriginal Title: The Mabo Case and Indigenous Resistance to English-Settler Colonialism_.”

  • “[Jump to content](https://en.wikipedia.org/wiki/Eddie_Mabo#bodyContent) From Wikipedia, the free encyclopedia Land rights activist for Indigenous Australians (1936–1992) | Eddie Mabo | | --- | | [![](https://upload.wikimedia.org/wikipedia/en/a/ad/EddieMaboportrait.gif)](https://en.wikipedia.org/wiki/File:EddieMaboportrait.gif)<br>Mabo c.”

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For specific readers

Mabo refers to Eddie Mabo, the Australian Indigenous land-rights activist whose 1992 court case overturned the doctrine of terra nullius. Not concerning, just historical and political vocabulary. If your kid uses it constantly, ask them where they first heard it, not to police their speech but to understand which online community they are in. Most slang of this kind moves through TikTok and group chats, so seeing it in your child's vocabulary just means they are plugged into normal teen internet culture.

Why is this section here?

Slang is read by different audiences for very different reasons. The For parents view re-explains the term in plain, non-judgemental language so a caregiver can understand what their child means without needing the surrounding subculture. The For English learners view focuses on register (when it's safe to use), formal alternatives, and common mistakes — what a textbook won't teach you.

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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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