"jacko" means: Jacko is an Australian informal nickname for the laughing kookaburra (Dacelo novaeguineae), one of Australia's most iconic birds, famous for.... This is informal slang, common in casual speech, texting and social media, but not appropriate for school work, applications or professional settings. There is no real cause for concern in itself; it is everyday peer vocabulary. If your child uses it, a light comment about audience and register is usually enough — no need to escalate. Context, more than the word, tells you whether to follow up.
jacko
Jacko is an Australian informal nickname for the laughing kookaburra (Dacelo novaeguineae), one of Australia's most iconic birds, famous for its distinctive call that sounds uncannily like loud human laughter.
Definitions
Australia
#1·Apr 28, 2026AUS
Jacko is an Australian informal nickname for the laughing kookaburra (Dacelo novaeguineae), one of Australia's most iconic birds, famous for its distinctive call that sounds uncannily like loud human laughter. The nickname follows the Australian tradition of giving birds and animals friendly, shortened nicknames — similar to 'maggie' for magpie or 'cockie' for cockatoo. The kookaburra's call is so strongly associated with Australia that it is a standard sound effect in Hollywood films to indicate jungle settings worldwide.
Every morning jacko would start up at dawn, and after a few days you stopped even noticing it.
Origin: Informal Australian diminutive, possibly from the name 'Jack' applied colloquially to various Australian birds and animals, or from 'jackass' — the kookaburra was historically known as the 'laughing jackass'. Editorial expansion authored on Slangora.
For parents
"jacko" means: Jacko is an Australian informal nickname for the laughing kookaburra (Dacelo novaeguineae), one of Australia's most iconic birds, famous for.... This is informal slang, common in casual speech, texting and social media, but not appropriate for school work, applications or professional settings. There is no real cause for concern in itself; it is everyday peer vocabulary. If your child uses it, a light comment about audience and register is usually enough — no need to escalate. Context, more than the word, tells you whether to follow up.
For ESL learners
"jacko" means: Jacko is an Australian informal nickname for the laughing kookaburra (Dacelo novaeguineae), one of Australia's most iconic birds, famous for.... Register: informal slang, fine in casual conversation, texting and social media but not in academic essays, business writing or formal speech. Note the regional or dialect label (Australian) — usage may sound odd outside that variety. A common non-native mistake is to use the word in the wrong register, or to assume one fixed meaning when it is actually polysemous; always check the surrounding register and the audience before producing it yourself. In formal writing, prefer a neutral synonym or a short descriptive phrase, and use this word only when you have heard
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Australia
#2·Apr 27, 2026AUS
(AU, informal) laughing kookaburra.
Cluster: violence
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For specific readers
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
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Other words near "jacko" (J)
jack jumperjacklegjackleg fencejacklightjacklightingJack Nasty-Facejack offjackoffjack-of-the-dustjackrabbitjack rafterjackroll
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Related terms
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Semantically related
- laughing jackass81%
Laughing jackass is the old Australian nickname for the laughing kookaburra — named for its famously raucous call that sounds unsettlingly like a person laughing uncontrollably. The term predates kookaburra as the mainstream name, and while it's now marked as obsolete in formal usage, it captures something the modern name doesn't: the bird's genuinely absurd, almost mocking sound echoing across the bush at dawn. In older Australian literature and speech, the laughing jackass was a quintessential sound of the outback.
- laughing jackass70%
(AU, obsolete) The laughing kookaburra, .
- whiskyjack60%
Canadian name for the gray jay (Canada jay), a bold, intelligent bird common across boreal forests. The name has Indigenous origins and reflects the bird's famously fearless habit of swooping into campsites to steal food. In Canadian outdoors culture it is regarded with affectionate respect -- the gray jay was even a candidate for national bird. Not slang per se, but a firmly regional common name with real cultural weight.
- whisky-jack59%
A Canadian nickname for the gray jay (also called Canada jay), a bold, friendly bird found across the boreal forests of Canada and the northern US. Whisky-jacks are famous for stealing food from campsites and being surprisingly unafraid of humans — which made them a fixture of wilderness life for Indigenous peoples and early settlers alike. The name is a corruption of the Algonquian 'wîskacân'. Canada officially made it the national bird candidate in 2016, though no official designation followed.