Bob's your uncle - everything is/will be perfect
Hitch in its getalong - broken, malfunctioning
Bless your heart (southern style) - can mean many things (mostly related to GFY) but NEVER means anything good and always said with a fake smile
Six ways to Sunday - every possible avenue of thought or effort has been made
Lagniappe (pronounced lawnyap) - a little something extra
It don't make me no nevermind - it doesn't matter to me
That dog don't hunt - it won't work
cattywampus - crooked
Gussied up - dressed up for church or a night out
gimme some sugar - hugs, air kisses, etc; used when greeting someone familiar to you
,,,as all get out - adds extra oomph to a phrase, ex: "I'm hungry as all get out" means "I'm VERY hungry"
So many more that I use; most are from my mother (Louisiana born, Houston raised) and my grandparents (from a ranch in the Hill Country of Texas)