It's PGA not PDA.

Brooks Koepka joined elite company by winning the PGA Championship on Monday (AEST) at Bethpage Black, fighting off the yips on the back nine to clinch a two-stroke victory over Dustin Johnson.

The win — which came after Koepka entered the final round with a seven-stroke lead — saw him join Tiger Woods and Phil Mickelson as the only players in the last 30 years to have won majors in three consecutive years.

But it was remarkably tense from the get-go.

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The Florida native showed he was anything but relaxed on day four with a brutal rejection on his way to the first tee.

Koepka's girlfriend Jena Sims tried to take advantage of some camera time by planting a loving kiss on her man — only to be firmly denied.

Brooks Koepka of the United States plays a shot from the second tee during the final round of the 2019 PGA Championship. Photo / Getty
Brooks Koepka of the United States plays a shot from the second tee during the final round of the 2019 PGA Championship. Photo / Getty

The actress, model and beauty pageant winner was burned not once but twice by her younger beau. Sims, 30, gently placed her hand on Koepka's arm to let him know it was PDA time.

But she mistimed her run as a golf bro swooped in for a fist bump and cut her lunch.

Not to be denied, Sims appeared to whisper something to the world number three before raising her chin and preparing for the smooch. Wrong again!

Koepka continued his denials by playing solid golf on the front nine to hold a six-stroke buffer over Dustin Johnson at the turn. But the wobbles hit on the back nine as four consecutive bogeys saw his advantage cut down to two strokes.

Johnson faded late and Koepka was rock solid on the 18th to finish at eight-under and secure his fourth major.

Sims' red-faced rejection wasn't the most embarrassing moment captured at the tournament.

Jon Rahm's rough showing — he was cut after posting a score of five-over in the first two rounds — got worse when he was caught urinating by TV cameras as Johnson readied to swing.

In the video, which has since made the rounds online, Rahm, 24, is seen in the background, relieving himself by a tree as Johnson, 34, practices his shot.