Native of Georgia (US) here. We use "all y'all" as a possessive. I've never hear...

kjs3 on Feb 11, 2014 | parent | context | favorite | on: Did English ever have a formal version of “you”?

Native of Georgia (US) here. We use "all y'all" as a possessive. I've never heard "alls y'all's" here, but have in the Southwest and thought it was linguistically slightly excessive. :-)