As if Blake Griffin's week couldn't get any worse, U.S. Olympic star Lolo Jones just went all the way IN on the hooper ... calling him the "worst date ever" and a "terrible kisser."
Griffin was part of a blockbuster trade from the Clippers to the Pistons on Monday ... which Lolo apparently thought was the perfect time to reveal her bad experience with B.G.
Sources tell us the two went on a date "years ago" -- and Lolo's post was a "half joke."
Wonder if Blake's half-laughing?