Washington D.C.'s Shy Glizzy dropped "You Know What" on Beats 1 Radio with Zane Lowe on Thursday. The track will be on Glizzy's Young Jefe 2 mixtape that will arrive July 15. Glizzy's voice ebbs and flows over the slow rolling, knocking beat with just a hint of melody every once in a while to make his boasts and threats land that much harder. Production was handled by Austin Millz. Listen to the song below via Apple Music.