The word "arse" is a crude and vulgar term for the buttocks or rear end. It can also be used as an expression of anger, frustration, or disbelief, similar to saying "oh my god!" or "for crying out loud!".
Usage examples
I can't believe he just kicked me in the arse!
She's been working her arse off to meet her project deadline.
He's always slacking off and expecting others to pick up the arse.
I need to find a comfortable position to sit, my arse is hurting.
They're making a complete arse of themselves with their foolish behavior.
It's time to get off your arse and start looking for a job.
I'm going to beat you at this game, so be prepared to be kicked in the arse.
The comedian's joke fell flat and left everyone with a confused expression on their arses.
I can't trust him anymore; he stabbed me in the arse by revealing my secrets.
We need to get this done quickly, so let's move our arses and get to work.
Android ™ 7.0 «Nougat» lets users get the most out of ZenFone AR with new multitasking features and other enhancements that deliver a great mobile experience (techlustt.com)
Another use of AR in the iPhone pertains to how users can utilize augmented reality in adding or placing virtual effects and objects on the person or subject of the image, just like how Snapchat's filters work. (ibtimes.com)