Women who seek out baseball players for sexual encounters, essentially baseballgroupies. This especially applies to groups of women who sit in the stands near the bullpen, hoping to talk to players.
The Bullpen Beef were sitting in the stands, talking to the relief pitcher, and hoping he would take them out with some of the other players for a nice meal at the Outback, followed by fellatio.
When white rappers have beef with each other, usually for no reason other than to be a douche but, more likely, to increase record sales because your career is slowing down and you grew a shitty beard.
People who claim to be anti-establishment, but who are in fact just parroting ideas and information they don't understand.
Billy Bob called Chris a "Sheep" for wearing a mask in a grocery store, so Chris called BillyBob "Cheap Beef", recognizing that Billy Bob only refuses to wear a mask because it's what his friends do.