NFL

Sure looks like Jets QB Sanchez baring his behind in dance vid

It looks like Mark Sanchez may have gotten himself mixed up in another buttfumble.

A video posted online appears to show the Jets quarterback and GQ cover boy bare-bottomed and dancing with two women at a swanky house party.

The 20-second clip, posted on TerezOwens.com, is jam-packed with cleavage, wine bottles, puffs of smoke and what the website says looks like Sanchez cheerfully dropping his trousers.

Though the party animal isn’t ID’d, he looks a lot like Sanchez and wears the signal-caller’s signature, soccer-style headband.

The website Deadspin pegged one of the females in the footage as Alana Kari, reporting her social media accounts Monday night shared videos of her on a getaway with friends in California’s Napa Valley. She has since removed the video.

Reps for Sanchez could not be contacted last night.

The 26-year-old quarterback, a California native, is preparing to fight for his starting job in his fifth season, after a disastrous 2012 in which he was benched multiple times.

He had 26 turnovers — 18 interceptions and eight lost fumbles, none more embarrassing than the slapstick Thanksgiving Night episode against the Patriots when he coughed up the ball after running into lineman Brandon Moore’s backside.

The Jets then used their second-round draft pick in April on quarterback Geno Smith out of West Virginia, and coach Rex Ryan has said there will be an open competition for the No. 1 QB gig in training camp.

Last week, following minicamp, center Nick Mangold told The Post he thought the majority of the Jets locker room supported Sanchez as the starter.

“Whoever gives us the best chance to [win], we want out there — and at this point, Mark gives us that best chance,” Mangold said.

Off the field, Sanchez has previously been linked to actresses Eva Longoria and Jamie-Lynn Sigler and model Kate Upton.