The former JetBlue flight attendant who infamously quit his job with a profane rant and a dramatic exit down the plane’s escape slide has disappeared in Mexico, cops in California said Thursday.

Steven Slater, who moved to Tijuana about a week ago, went missing after posting a message on Facebook on Sunday that said he was going to visit the city’s landmark Monumental Arch that night, according to the Chula Vista Police Department.

Friends couldn’t get in touch with him afterward and reported his disappearance to the Chula Vista PD.

Neither Slater, 47, nor the friends live in Chula Vista, but the department was obligated to file a missing-person report under California law, cops said.

A friend, Jim Fossett, told The Post that Slater has been working at SeaWorld in San Diego and moved to Tijuana to save money on housing by commuting across the border.

“He left his job at SeaWorld on Sunday to cross back over,” said Fossett, a 54-year-old nurse who lives in Los Angeles.

“He seemed like he felt pretty safe in the neighborhood where he lived. I don’t know if he met up with the wrong person or he got mugged or something.”

Fossett added: “Hopefully we’ll find him intact, but right now we’re all kind of worried.”

Slater – whose disappearance was first reported by TMZ – became a media sensation when he melted down near the end of an Aug. 9, 2010, flight from Pittsburgh to JFK Airport.

Slater argued with a passenger who refused to wait until the plane stopped to retrieve luggage from an overhead bin, and he got banged on the head when the door dropped down.

The blow to his noggin prompted Slater to grab a public-address microphone and announce, “To the f–king a–hole that told me to f–k off, it’s been a good 28 years!”

The wing-nut then grabbed his bags and a can of beer, activated the inflatable emergency chute and slipped to the tarmac.

Slater was busted that night at his Queens home and charged with felony reckless endangerment.

He later struck a no-jail plea bargain that required him to undergo a year of counseling and substance-abuse treatment, and pay JetBlue $10,000 to help replace the evacuation slide.