D.L. Hughley's joining the ranks of some other celebs and athletes to say good riddance to John Schnatter, and says he isn't surprised 'Papa John' used a racial slur ... because he's a "horrible dude."
We got the comedian at LAX Saturday and asked if he was done with Papa John's pizza ... he tells us he has been for a while now, for the same reason ex-NFL star Thomas Jones told us -- it's s***ty.
D.L. has some other reasons, too -- saying Schnatter's completely disrespectful -- and jokes that maybe he took the same Ambien as Roseanne Barr.