Hell hath no fury like a golfer's childhood sweetheart scorned. Exhibit A, according to the Daily Mirror in the U.K., is Holly Sweeney. She doesn't want to even hear the name of ex-boyfriend Rory McIlroy this holiday season, so she has outlawed her best friends from bringing up the 2011 U.S. Open winner's name over the Christmas season. She's so determined to not hear anyone speak about her ex-boyfriend, she's promised not to fraternize in the couples native town (Hollywood) in Northern Ireland.

After he tanked on the back-nine at the Masters, McIlroy decided to whack longtime manager Chubby Chandler and dump Sweeney, his childhood sweetheart this summer.

Breaking up can be hard to do, but apparently its much harder for the 21-year-old Sweeney, who had dated McIlroy since the tender age of 15.

McIlroy didn't spend much time on the relationship sidelines, though. The 22-year-old golf star almost immediately started going out with Danish tennis star Caroline Wozniacki. (For more on "Wozzilroy," read Martin Rogers' story on the power couple.)

Sweeney has forbidden McIlroy from sending her gifts -- even a greeting card is off limits. She even had a friend deliver special treats to her dogs at a home she had shared with her former boyfriend, according to the Daily Mirror.

McIlroy, who recorded a 40-yard drive at age 2 and made his first ace at age 9, is currently ranked third in the official World golf Rankings. He's made $5.3 million in career earnings, reports PGATour.com. McIlroy said last week that he's now thankful for falling on his face in the final round of the Masters.

Wozniacki has 18 career singles titles with $11.7 million in career prize money. She's the No. 1 ranked singles player in the world, according to the current WTA Rankings.

With her McIlroy censorship in place, Sweeney, an engineering student, is reportedly looking forward to a fresh start in her personal life as the calendar shifts to the new year.

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