Huge-Titted-Bitch, larger version of BTB
Breast size should be at least a D to qualify.
That HTB's got the best rack in school, look at'em. DAMN!
Big-titted-Bitch, smaller form of HTB
Average breast size for BTB should be at least a C
Damn dude, check out that BTB over there, she lookin' top-heavy as hell