Mass Up Boyz N Da Massis - Mass Up. Download the Mass Up mixtape or stream for free. No registration required. We are the Boyz N Da Massis which consist a group of 3 Blood brothers GTB Ball Hard, GTB Da Gasman, & GTB Block all born and raised in Birmingham, AL. The group was originally created in the streets and the original name was “Biker Boyz.” Eventually After a couple of years, the n…