When talking about beef in slang, it refers to a conflict or quarrel between people. This word is often used to describe disputes in music, especially in hip-hop, where artists may exchange sharp lines in songs. Beef does not necessarily only concern stars. In everyday life, this term can also be heard when two people have some tense situation or openly do not get along.
Beef is not always something negative. Sometimes it can even become a source of inspiration for creativity or just a public show that attracts attention. In any case, this word well conveys the mood and dynamics of relationships where there is tension.