Machine Gun Kelly had something to say about Eminem not performing "Killshot."

Em was asked to perform the diss cut at a recent show in Brisbane, Australia but he refused. 

"I would but I don't want to give that cocksucker any more fuc*ing light," he told the crowd. "Make some noise for your-fuc*in-selves and make nothing for MGK."

MGK took to Twitter on Wednesday night and said Mr. Shady made the right decision by not performing the song. Plus, he said "Killshot" is wack.

ay @Eminem u made the right decision not dropping that weak ass song in concert and putting everyone to sleep. 😂👎🏽🚮😈 #RapDevil

— colson (@machinegunkelly) February 21, 2019

It's evident that Em still gets under the Cleveland rapper's skin because besides sending the tweet, MGK lost it by smashing something that he was signing after someone mentioned Em's name. 

Now that both diss songs have been out for several months, which is better, "Killshot" or MGK's diss record "Rap Devil."