The Brief: Roast means "insult."

Bluesquiggle
DEEP DIVE

To roast someone is to put them on blast, drag them, or throw shade. The term employs the same fiery imagery as the idiomatic idea of burning someone.

https://twitter.com/talkingmyish/status/1100395793264054272

https://twitter.com/BarstoolMSU/status/1100861289834909696