Before you call someone a dumb american its how us Irish people say ass.
"There's a needle in my arse" - Jacksepticeye
"You fucking arsehole"
Being kicked out of your home, left alone with no where to live, ie homeless
My mam has left me out on my arse
Dry lumbs of poo caught in arse hair
“You’ve got arse beans”
When someone is acting out of the norm or questionable
Mom: "Are you high son?"
Son: " whipe yourd fuckin arse"
A rough arsed git is normally someone that appears to have good workmanship when in fact the work they produce is to a poor standard.
That work you did looked good, until I did a propper inspection and found out your just a rough arsed git
A rough arsed git is normally and engineer on a construction site that appears to have good workmanship when in fact the work they produce is to a poor standard.
Engineer: "that wall looks good you get the weepholes in ok"
Junior engineer: "them weepholes in that wall are wrong and not where they should be, I just bodged them to make them look good"
Engineer: "you rough arsed git"