WikiAnswers defines 'Texas Casual' as...
"Depends on the area of the state you are going to. The coast - breezy shirts with shorts and sandals. Hill Country - Polos or t-shirts with shorts and an umbrella (just in case) West Texas - Sunscreen! T-shirts, shorts, with a sweatshirt for nighttime East Texas - T shirt and jeans Panhandle - T shirt and jeans"
Where is Central Texas? They forgot to answer the question for Central Texas. Oh well, I ask around (friends always have good advice). I even went to 2 events dressed 'Trish Casual'. I fit in and I discovered 'Texas Casual' is anything from shorts, t-shirt and flip-flops to a dinner jacket, slacks & cowboy boots. I don't think most people know what 'Texas Casual' really is. There should be a better definition. When I'm invited to an event and there is a dress requirement I like to 'nail it'. I didn't feel I was 'nailing' Texas Casual, until last night....