RealGM

July 2, 2007 -- Oh, no, she didn't!

Yankee superstar Alex Rodriguez's long-suffering wife, Cynthia, may have finally flipped her pretty lid yesterday when she went to a game in The Bronx wearing a tight-fitting, white tank top bearing a foul message on the back: "F- - - you."

The obscene phrase was plainly visible to thousands of fans - including plenty of kids - as she, her 2-year-old daughter, Natasha, and an older woman took their seats in the players' family section of the House that Ruth Built.

"[One] father, was so embarrassed, he got up and left and took his son," who appeared to be about 10 years old, a fan said.

"I mean this kid was right in back of Cynthia - his nose must have been about 4 inches away from the words 'F- - - you.' "

Cynthia's F-word faux pas also may have violated Yankee Stadium policy.

The team's policy prohibits any banners or signs that are not in "good taste" and also warns that security guards will eject any guests "using foul language" or "making obscene gestures."

Still, when some fans let nearby security know about Cynthia's four-letter garment yesterday, nothing was done.

"It was noted by police and security," one fan said. "They were aware of it. I guess they didn't know what to do. I guess you don't kick A-Rod's wife out of the game."

It's not clear who the target was of Cynthia's F-bomb: Yankee fans, management, the media - or even perhaps her wandering husband.

But if Cynthia, 34, was trying to light a fire under A-Rod's struggling team with her shocking message, it didn't work - the bumbling Bronx Bombers got thumped 11-5 by the Oakland A's.

The loss left them four games under .500 and 11 games behind the arch rival Boston Red Sox, who are solidly in first place in the American League East.

Cynthia's shocking breach of stadium etiquette comes a month after she was publicly humiliated by her straying hubby's catting around the country and Canada with a busty, blond Las Vegas stripper and Playboy wannabe named Joslyn Noel Morse - revealed in a Post expos