Dozens of fans were chanting it ... "BIG D*CK RICK" ... but was Rickie Fowler distracted???
Hell no!!! In fact, the golfer loved it so much he egged on the crowd and then sank his putt!
It all went down Saturday at the famous No. 16 hole at the Waste Management Phoenix Open in Scottsdale, Ariz. ... where Rickie took the tee box to a HUGE applause.
At some point, after Rickie stuffed his iron shot just a few yards from the hole, though ... the clapping turned to chanting, with fans yelling "Big D*ck Rick" at the 31-year-old.