A Korean Tour golf star was so pissed when he heard a fan snap a cell phone pic during his backswing, he flipped the guy off ... and now the golfer just got hit with a 3-YEAR BAN!!!
Kim Bi-o -- an ex-PGA Tour golfer and the current money leader on the Korean Tour -- snapped on a fan on the 16th hole at the DGB Financial Group Volvik Daegu Gyeongbuk Open on Sunday when he heard the phone make a shutter sound effect during his swing.
Everyone knows that's a big no-no -- golfers HATE noise when they're on the tee box.
So, after 29-year-old Kim heard the camera click ... he wheeled around and shot the fan the bird right in front of EVERYBODY!!!
Kim -- who still went on to win the tournament -- apologized for the gesture afterward ... but clearly, officials felt that wasn't enough.
The Korea Professional Golfers' Association announced Tuesday they were hitting Kim with a THREE-YEAR SUSPENSION for the incident, saying, "Kim Bi-o damaged the dignity of a golfer with etiquette violation and inappropriate behaviour."
The KPGA also announced it was fining Kim the equivalent of $8,350.
The golfer didn't take the news lightly ... he got down on his knees in front of Korean media on Tuesday and apologized for his actions once again.