To be caught off guard and severely beaten by one or several assailants, in witch they continuously kick and punch the victim with bad intentions. The attack usually ends when the victim has lost Consciousness or concerned witnesses step in sometimes to no avail.
justin: did you hear what we did to that guy ?
me: he looked like he got brotherd up.
justin: damn right brother!!!!
adam: yo, at that concert some kid was talkin shit and got brotherd up!!
me: i love when that happens.