Best-selling rapper Ludacris testified Thursday at a copyright infringement trial that he never heard an expression that he allegedly swiped to create his 2003 hit “Stand Up.”

Ludacris, whose real name is Chris Bridges, also said he never received copies of a disk containing the song “Straight Like That” by the East Orange, N.J., group I.O.F. The group is suing him in U.S. District Court in Manhattan.