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 cold beer and watch the footy, it's going to be 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.
"Oh my fucking sweet jesus tits! Check out those...tits!"