1. (Noun) The act of continually pouring grease over oneself with the intent of cleaning oneself; usually done in the state of Texas or by former Texas natives.
2. (phrase) Something you should never ask to do after the first date.
"Dude, did you see Will's hair? It looks like he took a Texas Grease Shower!"
"You should never ask for a Texas grease Shower after the first date. Never." (The MANual, 2007)