New York Jets QB Mark Sanchez in semi-nude viral dance video

New York Jets quarterback Mark Sanchez smiles during Jets training camp practice in Cortland, New York, July 27, 2012. (Reuters)

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.

Go to The Post for more.