A “big bully” sheriff’s deputy was placed on leave after he was caught on video pulling a gun on a teen at a California skatepark — and allegedly threatening to shoot the youngster in the face.

The Orange County Sheriff’s Department deputy was off duty when he approached a group of teens in San Clemente on Saturday and asked them to turn down their loud music, KABC reports.

Video obtained by the station shows the unidentified deputy pointing a gun at a teen who briefly raises his skateboard during the confrontation. The deputy also briefly flashes his badge as the teen backs away with his hands raised, video shows.

The deputy did not immediately identify himself as a law enforcement officer, the mother of one teen told the station.

The skaters agreed to turn down their music, but that didn’t satisfy the hostile deputy, another teen said.

“He was coming up to a friend very fast and aggressive, so my other friend jumped in and put his hand out for him to stop,” Koa McClung told KCBS. “My other friend held up his skateboard for him to stop, then the guy pulled a gun and said, ‘I’ll shoot you in the f–king face if you don’t stop.’”

Some teens told the station they weren’t sure that the badge flashed by the man was authentic, particularly given how they said the lawman was acting.

“I was right next to the kid that he pulled the gun on,” Sage McClung told KCBS. “The officer wasn’t acting like an officer, just a big bully.”

The deputy has since been placed on administrative leave after an internal probe was launched Wednesday.

“Orange County Sheriff’s Department employees are expected to conduct themselves with professionalism on and off-duty,” agency officials said in a statement. “We take this incident seriously and will fully investigate.”