WATCH: Course heckler quickly shuts up as Bubba Watson stands up for Rickie Fowler

"Not so tough now, are you?"

Bubba Watson has no time for loudmouths who ignore the most basic of golf course etiquette. During the opening round of the the Memorial Tournament on Thursday, a heckler shouted something in the direction of Rickie Fowler, who was paired with the no-nonsense Watson. The microphones could not pick up the comment that immediately followed Fowler's missed putt and the world number five shot the crowd the dirtiest of looks. But Watson was unable to hold his tongue as he asked "who said it?" When his question was met with deathly silence, Watson then ensured there'd be no more interruptions with a bad-ass "not so tough now, are you?" Video via The Big Lead