A bandwagoner who's perspective is easily fed by common media, building more 'beef' into an opinion, even if it is highly uneducated. In other words, somebody who literally does not know what they're talking about.
"Screw you, beefer! You don't even know what you're talking about."
A typical rebellious male teenager that overuses swear words and often starts or ends their sentences with the term "bro".
"Bro, did you see that fucking funny ass video? It was fucking funny as hell!"
"This guy is a gigabro..."