The Brief: Beef is a grudge or dispute between two or more people, usually online.

DEEP DIVE
Beefin’ refers to the back-and-forth that beef often entails.
Silly rap beefs just get me more checks –Nicki Minaj, “Swish Swish” by Katy Perry
am i the only one who’s found the nice side of the fandom?? i don’t have much beef, i don’t have any ppl being a twat and all the roadies i know are genuinely so lovely
— izzy the precious egg (@simplycobban) August 16, 2018