Pamela Anderson -- Hey Rick, I'm Out! Files For Divorce Again

Third time's a charm ... even in divorce -- Pamela Anderson just filed to divorce Rick Salomon for the third time, but this time she means it ... we're sure.

According to docs obtained by TMZ ... the "Baywatch" babe separated from Salomon Tuesday and then ran to court Wednesday to file for the divorce ... a familiar process for these two.

We'll break it down -- their first marriage was in 2007 ... but she got an annulment after 2 months. They tried again in January 2014, and made it a whopping 6 months before Pam filed divorce docs. She eventually called off the split -- after they were seen making out in Malibu a week after she filed.

This time Pam's asking for spousal support from Rick, who's a pretty big deal in his own right -- as a poker champ and a Paris Hilton poker champ. He's the co-star of "One Night in Paris."