Def Squad is a rap supergroup consisting of Erick Sermon, Redman & Keith Murray. Mally G is considered an honorary member of the Def Squad. Before officially forming as a group to release an album in 1998, they had each been featured on tracks by each other. The Def Squad was formed following the disbandment of the Hit Squad, who broke up after the struggles between EPMD members Erick Sermon and Parrish Smith.

They are known for their remake of Rapper's Delight by Sugarhill Gang.

Def Squad Records has recently signed a deal with SRC / Universal Records. The trio has resurfaced as of 2007, appearing on Redman's solo album Red Gone Wild and on Keith Murray's Rap-Murr-Phobia.