Keith Grayson (born August 14, 1966), professionally known as DJ Kay Slay, is an American hip hop disc jockey (DJ) from New York City. He was referred to by The New York Times as "Hip Hop's One-Man Ministry of Insults".  Kay Slay goes by several monikers, namely The Drama King, Dezzy Dez and Slap Your Favorite DJ.  He has released four studio albums, The Streetsweeper, Vol. 1, The Streetsweeper, Vol. 2, The Champions: North Meets South (with Greg Street) and More Than Just a DJ.

DJ Kay Slay released his debut album, The Streetsweeper, Vol. 1, on 20 May 2003. In the summer of 2003, Kay Slay released a single, accompanied by a music video, for a song titled "Too Much For Me". The single, which features a chorus sung by then-up-and-coming singer Amerie, also features verses from American rappers Birdman, Nas and Foxy Brown. The song peaked at number 53 on the US Billboard Hot R&B/Hip-Hop Songs chart, making it the DJ's highest charting single to date. The single's music video includes cameo appearances by Swizz Beatz, N.O.R.E., Raekwon, WC and Lloyd Banks.[citation needed] Although the song was not a major success, its music video was aired on MTV Jams and BET. The "Too Much For Me" video did not feature Nas (because of Nas' solo projects) or Baby; so Loon was featured instead. This replacement started a feud between Nas and Kay Slay.

On March 30, 2004, Kay Slay's second album The Streetsweeper, Vol. 2, was released. Another single and video were released for "Who Gives A...Where You From" with Three 6 Mafia, which peaked at number 89 on the Hot R&B/Hip-Hop Songs. Kay Slay and the song were featured on the 2004 NFL Street video game.

After releasing More Than Just a DJ in 2010, Rhyme or Die is scheduled for release in 2015. The album's first two single "60 Second Assassins" featuring Busta Rhymes, Layzie Bone, Twista and Jaz-O and "The Kings of the Streets" featuring DJ Khaled, DJ Drama, DJ Doo Wop and Fly Nate were released in 2011.

In 2013, "About That Life" featuring Fabolous, T-Pain, Rick Ross, Nelly and French Montana was released as a single from Rhyme or Die. It debuted and peaked at #54 on the Hot R&B/Hip-Hop Songs chart, making it one of Kay Slay's most successful singles to date. In the beginning of 2014, "Free Again" was released featuring Fat Joe and 50 Cent, which came to a surprise for some seeing as how they had beef before, but have since reconciled.