Ex-Miami Marlins President Flips Off And Trolls Hecklers, 'F*ck You!'

Ex-Miami Marlins president David Samson egged on hecklers at a party this weekend ... flipping off the crowd, bragging about his team's sale and then screaming, "F*ck you!!!"

It all went down at ESPN personality, Dan Le Batard's birthday party in Miami ... where Samson -- one of the biggest sports villains in the city -- got up onstage for a speech.

The dude -- who many blame for making the Marlins a mess and forcing city's taxpayers to foot the bill for their new stadium -- was boo'd relentlessly before he could even open his mouth.

Samson's message to his haters??

"Thank you so much. Thank you very much. Here's why I love when you guys boo me. Right? I want you guys to keep booing me. Because guess what? $1.2 BILLION! F*ck you!!!!"

Of course, Samson's reference represents the amount of cash he and former owner Jeffrey Loria were able to sell the Marlins for, to Derek Jeter last year.

For their part ... both Samson and Le Batard say the whole thing was a joke, with Samson writing on Twitter, "Actually,not at all how it happened. All on tape and all in good fun. And, all for Lebatard’s birthday. No bragging, no fleecing."

Added Le Batard, "These bleeping fun suckers. Samson was playing the heel wrestling manager. No one would seriously wear that jacket. I was booing Samson before taking the mic from him. You don’t get the show."