Yankee legend Yogi Berra has filed a $10 million lawsuit against TBS, accusing the cabler of tarnishing his squeaky-clean rep in a racy Sex and the City ad. The offending poster, which appeared on buses and in subways, asked folks what "yogasm" meant. The possible answers: (a) a type of yo-yo trick, (b) sex with Yogi Berra and (c) what Samantha has with a guy from yoga class. The 79-year-old Hall of Famer "is a married man and has children and grandchildren," the court papers say. "He is a deeply religious man who has maintained and continues to maintain a moral lifestyle and has a spotless reputation for integrity, decency and moral character." In the meantime, the answer to the above query is hidden somewhere in this column. Good luck!