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West Village residents are kicking up a stink over a “serial farter” who’s polluting the neighborhood.

Earlier this year, a local blog posted, “It’s happened thrice, so it can’t be a coincidence: There’s some guy who I believe is playing a fart sound as he passes people as some sort of social experiment. I think it’s always the same . . . fart.”

The sleuth posted, “Every time . . . while I was talking to a friend . . . we just get interrupted by this fart that leaves us silent and staring. He plays it as he passes and never looks back, acts like nothing happened. Guy is white, college age, very straight-laced looking.”

The not-so-silent-but-deadly dude went quiet for a while, but one area insider told us on Tuesday, “My wife and I were walking by Washington Square Park, and the guy passed by and just ripped one, and we both started laughing.”

The couple deduced from the blast it could not have been human.

“The dude had a backpack,” said the source, wondering if it housed a flatulence-simulating device.

The source snapped a picture of the prankster — a hipster in shades, shorts, a short-sleeved button-down shirt, running shoes and a gray backpack.

Citizens beware.