Ellen DeGeneres Sued Over Hilarious 'Titty' Joke

A Georgia woman has her t** in a ringer over a joke Ellen DeGeneres told on her show ... in fact she's so upset she's suing the talk show's producers for allegedly besmirching her good name.

In a segment called "What's Wrong with These Signs?" Ellen showed a real estate sign advertising a broker named Titi Pierce. Ellen assumed -- as we would -- it was pronounced "titty," but Titi says, "as grammar dictates," it's pronounced "Tee Tee."

Pierce says in her lawsuit ... no one has ever made such an error in her 35 years on planet Earth. As such, she's suing for defamation and invasion of privacy.

The realtor says, to add insult to injury ... she was on her way to a funeral when the segment aired and she got lots of mocking calls on her cellphone. She also says "The name-calling led to immediate ridicule and raucous laughter from the show's live and television audiences."

Pierce says she's suffered emotional distress, embarrassment and anger.