Wow, some of these are *terrific*
Let's see, these are some Southern (US) and some PA/Pittsburgian:
Ya'll - You All / All of You
"Do ya'll want to go to the beach?"
Fixin' - About to do / Preparing to do
"I'm fixin' to clean up this room"
Yinz/Yins - You all/ All of You (Pitt)
An at - [and that] and other misc/ sundry activities, used as a suffix
don - [down], as in traveling to a location, sometimes don ere'
All three put together in an amazing bit of colloquial PA:
"Yins going don ere' to see the Steelers an at?"
The Wifey© is hilarious when she turns on the Pittsburgese since normally she has zero accent.