I just used
In a post.
Like
It can have various meanings, “I’m sorry that happened to you” to “You are an ass.”
What other uniquely Southern insults are there?
Well,
“Hey Boy” can mean anything from a friendly hi to something that makes the N word look friendly by comparision. One of the times I have been most pissed, felt disrespected, and actually feared for my safety is when a Georgia cop kept calling me “boy” in that certain tone late at night alongside the road in the middle of nowhere.
“That boy aint right” is a pretty obvious statement (though southern style) that somebody isnt playing with a full deck in one way or another.
Yankee
Damn Yankee
.
That child ain’t right.
I hear “Your mother went to Auburn” can get ya killed in Tuscaloosa…
Back in grandpa’s day they would have kept him/her upstairs.
How so?
I know that elephants go there for dental work.
Yankee - tourist/visitor
Damn yankee - Coming to the Southland to work on a project
GD Yankee - moves there
Same as doing “Hoddy Toddy” in Starkville. SEC rivalries are serious bidness.
This is a sports thing, right?
That is Hotty Toddy, Oakminster. Tsk.
I don’t have a clue.
Like I care. Go State!
You’re still okay unless I hear “Roll Tide” coming from your lips. 
@carnivorous: It’s an Ole Miss cheer, which is rather nonsensical.
I used “bless his heart” in a Facebook post in response to an article posted by a friend. My friend, who is a native New Yorker who now lives in PA, didn’t get it.
We have gone from insulting Yankees to a sports venue.
Sorry for the hijack.
Bless your little heart.
You’ll have to look over him, he ain’t had no home trainin’.
This is related to my personal favorite, “I can explain it to you, but I can’t understand it for you.” I use this one a lot.