Funkmaster Flex, known for his vicious attacks on mumble rappers everywhere, came out impressed by Desiigner's A Capella freestyle. The Brooklyn emcee visited the DJ's Hot 97 radio show Thursday and delivered a two-minute electric off-the-dome performance. 

Funk Flex who, last year, chewed out Lil Yachty and Bow Wow for lack of bars, looked genuinely impressed with his guest. The "Panda" rapper spit rapid fire rhymes after rhymes delving deep into his own life. 

"Everybody can't come up here," he said before and after Desiigner's freestyle. The look on Flex's face during the performance prompted Twitter to clown him a bit.

Desiigner has recently released the single "Outlet" and featured on Tyga's "Gucci Snakes." The 19-year old G.O.O.D. Music artist is going on the Outlet tour this summer across North America.