Chumlee won't be pumping up the jam on the Strip ... he just cancelled his DJ appearance.
The "Pawn Stars" co-star was set to spin at Tru Nightclub Friday evening in Vegas, but since he just got out of jail Thursday ... the club was unclear if he'd show. Chumlee's lawyer tells us he proactively chose to bow out.
As we previously reported ... Chumlee was arrested after Vegas cops say they found drugs and a gun in his home while serving a search warrant for a sexual assault investigation.
He was sprung after posting $60k bail.