A way to describe one's mother in an offensive type of way yet the true intention of it is, just banter.
Carlo: Hey Bil wanna go play football?
Bil: Yer Oul One!
Silvio: Who ate my butter nut scotch!
Bil: Yer Oul One!
Bil: Yer Oul One!
Silvio: Who ate my butter nut scotch!
Bil: Yer Oul One!
by Cornelius J. Fillmore November 3, 2019