back one out
Australian crude slang meaning to defecate, with the sense of cautiously extruding or 'reversing out' a bowel movement.
Definitions
Australian crude slang meaning to defecate, with the sense of cautiously extruding or 'reversing out' a bowel movement. The phrasing has a deliberately absurd vehicular metaphor — 'backing out' as you would a car — which is typical of Australian earthy humour. Used in casual blokey conversation and comedy contexts. The phrase is blunt but more comic than aggressive in register, and it lands as a knowing joke rather than a shock term.
He'd eaten a whole pack of Tim Tams and announced he needed to go back one out before they got back in the car.
Comments
Australian slang for defecating, using the spatial metaphor of backing a vehicle out of a space. Somewhat euphemistic compared to more direct terms, but the vehicle imagery makes it simultaneously vivid and deniable. Casual in register and typically used among friends rather than in polite or mixed company. A characteristic example of Australian slang's preference for unexpected metaphors. The slang falls into the Australian tradition of applying mundane mechanical metaphors to bodily functions for deadpan comic effect.
He told the group he'd be five minutes — he needed to back one out before they left.
Comments
(slang, Australian) To defecate.
Back one out means: To defecate.. It is mainly Australian English and may not be understood outside that context. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.
back one out means: To defecate.. Register: very informal, slang. Suitable only for casual conversation, chat and social media. Do not use in business, academic or news writing. A common learner mistake is using the word in a register it does not fit, or assuming a single global meaning; native speakers immediately notice when slang appears in formal contexts, so always check the surrounding register before producing it yourself.
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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.
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Semantically related
- go backwards73%
(obsolete, slang) To defecate; to visit the privy.
- bend one off71%
A crude British and Australian colloquial phrase meaning to defecate. Like much toilet humor slang, it favors the oblique and physical — the verb 'bend' evoking the physical effort sometimes involved. It's the kind of expression you'd hear in a pub conversation or a locker room, where euphemistic but still vulgar language is the preferred register. More common among older generations and working-class speakers in the UK and Australia, it's blunt, unglamorous, and entirely functional.
- bag out71%
(slang, Australia) to criticise someone.