Yer ass
A vintage low guinea response when you don't like what someone has said to you.
John ``Hey, Ann Marie, eat some more so you look even fatter''
Ann Marie: ``Yer ass!''
Ann Marie: ``Yer ass!''
pop it in yer ass
when you pop something in your anus or even the rectum which is the same thing.
Billy was a fag so he loved to pop things in his ass