Jon Rahm throws a loud F-bomb on a hot mic during the Open Championship

Jon Rahm is going to have to wash his mouth out with soap...because the golf star was caught swearing after a failed putt at The Open Championship on Friday -- passionately shouting "F***!!!"

The explosion happened on hole 10 in the second round as Rahm was looking to make the par...but things didn't go to plan, and he let everyone hear his frustration.

“Apologies for any language,” the announcer said shortly after the f-bomb.

The 28-year-old Spanish pro hasn't been the happiest of campers at the Royal Liverpool Golf Course this week... expressing his frustration with his game, as well as the number of people surrounding him in the opening round.

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He even mocked members of the media following Rory McIlroy... saying he had a "boom mic on his ass" as the cameras followed his partner.

The two-time major winner will have some work to do if he looks to improve his place in the standings...he's currently tied for 49th at +2 over two laps.

It's not the only wild moment of the Open so far: as we've already reported, a bird pooped on Viktor Hovland on his first outing on Thursday.