(Noun) A Dillon fast food sauce on Friday Night Lights. It's Smash's favorite sauce.
When used as an adjective, it just means it's really awesome sauce, or just...really awesome in general.
"Yo I need 2 burgers, well done, with some Alamo Sauce." (Noun)
I don't know what this sauce is, but it's some damn good Alamo Sauce.
That party last night was Alamo Sauce!