Blake Griffin -- Drunken Mexican Bro-Down ... With John Stockton?!

Blake Griffin got drunk in Mexico this weekend and decided to mess with some guys wearing Team USA basketball jerseys ... honing in on a guy in a John Stockton uniform ... and it's pretty hilarious.

It was a combination of friendly heckling and drunken bro-ing out ... and everybody seemed to be getting along great.

One of the most interesting comments ... when Blake points out the Stockton jersey to a pal and says, "Best point guard ever, bro!"