Tequila guerrilla

A big, huge bar fight between drunk people, like in the old spaghetti western movies, very often acclimated in a filthy southern/southwestern bar or in the mexican border.

-Dude, the last night some drunk tejanos came to the bar, and after drinking lots of shots they started a big bar riot.

-Wow, that must have been a serious Tequila guerrilla, like in Wayne's movies.