messed you around

cause someone problems, especially by acting unfairly or indecisively.

"get your own back—make him sorry he ever messed you around!"

Keep messing around you will be the bad smell in the attic

Meaning if they do not stop mucking about they will be murdered and tossed into said attic

Person 1, Yeeeeeet I'm only 16 I wanna kill a mockingbird by shoving a dog up his arse

Person2, Oi YOU SILLY BUGGERING BENT OVER SHEEP SHAGGER TALK ANY MORE SHIT ILL SKIN YOU FROM THE COCK AND LEAVE YOU IN THE FOCKEN ATTIC YA WEE BASTARD

person 1, you don't half talk shite you do

Person 2, THATS IT CUNT KEEP MESSING AROUND YOU WILL BE THE BAD SMELL IN THE ATTIC