Russell Westbrook just scored another W over an NBA heckler -- the $100 million lawsuit filed against the NBA superstar has been thrown out ... TMZ Sports has learned.
According to court docs, a judge ruled in favor of Westbrook on Thursday ... saying he didn't defame anyone by clapping back at a couple who harassed him during a 2019 game in Utah.
As we previously reported, Westbrook was sued by Shane Keisel -- a U.S. Army vet who got into it with the then-OKC Thunder player during a March 11, 2019 game against the Jazz.