Robbie Kneivel

Robbie Knievel has said he's a frickin' drinking, driving daredevil ... and cops believe he's stayed true to his word -- he's been busted for a felony DUI. According to law enforcement ... Knievel -- the son of the legendary Evel Knievel -- caused a brutal 4-car pile up on a Montana road and fled…

Robbie Knievel -- the daredevil son of Evel Knievel -- was arrested for DUI in South Dakota this week after cops say he went on a drunken rampage in his motor home, TMZ has learned. We've confirmed ... the 51-year-old was arrested on Tuesday around 6:38 PM outside of the Buffalo Chip campground…