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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
up their arse
Grammar usage guide and real-world examplesUSAGE SUMMARY
"up their arse" is correct and usable in written English, though it is informal and can be considered vulgar. You can use it in contexts where you want to express frustration or annoyance with someone's behavior or attitude. Example: "He always thinks he knows better, but he really has his head up their arse." Alternative expressions include "in their own world" and "full of themselves."
✓ Grammatically correct
News & Media
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
10 human-written examples
"I think some people rebel by slamming doors and telling their parents to shove it up their arse.
News & Media
Maybe after doing something as ridiculous as voluntarily putting a hose pipe up their arse, people are ashamed to admit it may have been pointless.
News & Media
Turns out it's not only rottweilers you can stop biting by sticking a finger up their arse.
News & Media
But that's far more enjoyable than somebody who's really precious about their work and has got their head up their arse".
News & Media
I'd like to think that if I were a member of One Direction – even Louis – I'd have told the Brits to stick that tokenistic award up their arse, demanding something meaningful or nothing at all.
News & Media
At its worst, this is a bit like going on holiday with someone who's visited your destination before, and behaves like a squawking tourist guide the whole time you're there, pointing out the best cafes and choosing from the menu on your behalf until you feel like ramming their digital camera up their arse, just so they'll be able to take home a picture of something they haven't seen before.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
50 human-written examples
And as for the eccentric alternative acts whom Lee does so much to champion – the Andrew Baileys, Chris Lynams and Simon Munnerys, fireworks sizzling up their arses and buckets on their heads – well, live comedy at its weirdest will always be script-proof, and much the better for it.
News & Media
They were going up their arses; iii.
News & Media
The grown-ups in number 13 Richmond Road, despite having metaphorical poles up their arses which make them ill at ease with each other, try to enjoy themselves.
News & Media
"They can stick my heart up their arses!" Gil's heart gave up for the last time a little over a year later.
News & Media
They can stick their fucking baguettes up their arses!" Photo by Natasha Bright.
News & Media
Expert writing Tips
Best practice
Use this phrase to emphasize extreme frustration, dismissal, or a perception of someone's total self-absorption.
Common error
Avoid using the American spelling "ass" if you are aiming for a specifically British voice or if your surrounding text uses British English spelling conventions. Additionally, be careful not to confuse "arse" with "there" or "their" in sentences like "head up their arse", as "their" is the possessive pronoun required here.
Source & Trust
91%
Authority and reliability
4.2/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "up their arse" typically functions as a prepositional phrase used within larger idiomatic constructions. In many instances provided by Ludwig, it acts as the complement to verbs of movement or placement like "shove", "stick", or "ram". It is also frequently found in the stative idiom "to have one's head up their arse", indicating a state of arrogance or lack of awareness.
Frequent in
News & Media
85%
Informal Speech
10%
Arts & Culture
5%
Less common in
Science
0%
Formal & Business
0%
Academia
0%
Ludwig's WRAP-UP
The phrase "up their arse" is a common British vulgarity used to express deep dismissal, frustration, or a critique of arrogance. According to Ludwig, the expression appears frequently in News & Media outlets like The Guardian and Vice, often to convey a sense of raw, authentic reaction or to characterize self-important figures. While Ludwig AI classifies it as grammatically correct within its idiomatic context, writers must remain aware of its high vulgarity. It is almost exclusively found in British English contexts, where its counterpart "up their own backsides" serves as a slightly more polite (though still informal) alternative. Use it only when the tone permits aggressive colloquialism.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
up their own asses
The American English equivalent of the query phrase.
up their own backsides
A slightly milder British alternative that still conveys arrogance or self-absorption.
full of themselves
A non-vulgar way to describe someone who is self-important.
stuck-up
An adjective describing the same personality trait without the anatomical reference.
self-absorbed
A neutral descriptive term for the behavior described by the idiom.
arrogant
A formal adjective that captures the semantic essence of being self-involved.
pretentious
Suggests an affectation of importance often linked to the phrase in arts and media.
conceited
Focuses specifically on the excessive pride implied by the idiom.
in their own world
Focuses on the detachment from reality often implied by the phrase.
unreasonable
Describes the result of having one's head in such a position.
FAQs
Is "up their arse" considered offensive?
Yes, it is considered vulgar and offensive in most formal settings. Depending on the context, you might choose a milder alternative like "up their own backsides" or "arrogant".
What is the difference between "up their arse" and "up their ass"?
The primary difference is regional spelling. "Arse" is the standard British English spelling, while "up their ass" is the American English equivalent.
How do you use "up their arse" in a sentence correctly?
It is often used with the verb 'stick' or 'shove' to show defiance, such as: "They can stick their award up their arse." It can also describe a person: "He is so "up his own arse" he doesn't notice anyone else."
What can I say instead of "up their arse" to sound more professional?
In professional environments, it is better to use terms like "self-absorbed", "pretentious", or "unreasonable".
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
91%
Authority and reliability
4.2/5
Expert rating
Real-world application tested