bra busters
Huge breasts, especially ones that break free of a woman's bra.
Salma Hayek is known just as much for her big breasts as she is for her acting. Those bra busters really put on a show of their own!
bra buster
A girl or woman with big tits. A chick who is stacked. Someone who has big jugs.
"Look at her! Those must be D cups, at least."
"Yeah - she's a real bra buster!"
"Yeah - she's a real bra buster!"