61-year-old Donald Thompson should have known that using a penis pump in court was not a good idea ... especially as the judge!

After being caught the Creek County, Oklahoma judge spent 20 months in prison, guilty of four counts of indecent exposure. He was initially suspended from the bar association, but the State Supreme Court has decided it best to completely revoke his ability to practice law.

“The nature of the crimes in this matter led this Court to conclude that nothing less than disbarment is appropriate,” Justice John Reif wrote as the court’s opinion. “The conduct was not isolated, having occurred over a fairly lengthy period of time and on four separate occasions.”

The judge quickly discovered it's no fun pumping without an audience.