NY- Oh, no, she didn’t!

Yankee superstar Alex Rodriguez’s long-suffering wife, Cynthia Rodriguez , may have finally flipped her pretty lid Sunday 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.