Everything's bigger in Texas, including the slang. Southern charm meets cowboy swagger, "fixin' to," "y'all," and "bless your heart" are survival vocabulary down here.
Y'all
You all. The essential Southern pronoun that solves English's lack of a second-person plural. It's efficient, it's warm, and once you start saying it, you never stop.
Fixin' to
About to do something, getting ready to. It's the Southern "I'm going to" but with more intention and a side of drawl. You can be fixin' to do literally anything.
All hat, no cattle
All talk, no substance. Someone who looks the part but can't back it up. In Texas, where cattle is real wealth, wearing a big hat with nothing to show for it is the ultimate fraud.