ASPEN, CO – Busted for public urination once, piss on you; busted for public urination twice, piss on Glen.

Less than 24 hours after Oklahoma City Thunder guard Nate Robinson was caught urinating outside a bookstore in a New York City suburb, the three-time NBA slam-dunk champ was busted again Saturday for relieving himself in public.

Colorado police say an officer spotted Robinson, and former Boston Celtics teammate Glen “Big Baby” Davis, driving a motorized mini-scooter just outside of Aspen Saturday evening.

When the two were pulled over for erratic driving, Robinson was caught urinating on the back of Davis (click for police footage), who was operating the vehicle at the time of the offense.

Authorities told reporters that Robinson was taken to police headquarters, issued a summons and ordered to show up in court June 28. The offense normally carries a $50 fine … and some dry-cleaning expenses.

Robinson posted a message on Twitter on Sunday saying he made a “silly mistake,” but that Davis had told him to “just go, man.” He promised it wouldn’t happen again.

Thunder spokesman Brian Facchini says the team is aware of what happened — again — and that the organization is looking into acquiring Robinson his own pocket pee-bag.