A saying that is generally used to describe something that is considered to be awesome, whether it be an object or to simply express satisfaction, acceptance and approval of a certain situation by comparing it to femalebreasts.
Biff Wellington: "I can't wait to finish work and just kick back with a coldbeer and watch the footy, it's going to be sweet as tits"
Jack Mehoff: "Dude! My new car is sweet as tits!"
Pat Hiscock: "Hey, man. Your penis enlarger just arrived in the mail..."
Mike Hunt: "Sweet as tits!"
An exclaimation, generally used to describe either something surprising or something extremely cool, radical, awesome, or any other adjective from the Ninja Turtle vocabulary.