A tit bully is someone who's breasts are large, flaunted and outright bully others around them with smaller breasts.
In many instances flaunting is not required to be a Tit Bully. If it is obvious that someone has huge boobs then they are still considered a Tit Bully.
An example of a Tit Bully would be a girl with huge boobs. She in essence bully's those with smaller boobs.
where a woman who to apologise to her friends who happen to be men or any other men shows her tits.
man: you put a dent in my car.
woman: I'm sorry.
man: sorry dosn't take the dent out of my car.
woman pulls up her blouse and shows her tits:look at these.
man: can I touch 'om?
woman:yeah.
man:I forgive you.
and that is an example of a tit apology.