White hat wearing jock boys who like to fight guys that don't look like them. They first appeared somewhere back east and they can be heard saying "DAMN BRO!" all the time. They are supposedly highly homophobic so they need to beat up guys they think are fags. Rumours of date raping college girls has also been said.
My friends were at a Social Distortion concert and a bunch of Damnbros came up and kicked the shit out of them.