Lyin’ Long Island Rep. George Santos flashed a sly smile alongside former mayoral GOP candidate Curtis Sliwa Friday as the pair protested a recently opened mass migrant shelter in Queens.

Donning his well-loved fleece vest, the embattled congressman giddily joined the ranks of dozens of angry protesters posted outside the Creedmoor Psychiatric Center in Queens Village.

The mass “tent city” shelter on the grounds, which opened to asylum seekers in August, has the capacity to house 1,000 adult men.

Santos, who is under a 13-count federal indictment for alleged fraud and money laundering, slammed the shelter as a “political stunt.”

“This is political pandering,” he told a crowd of protesters carrying “America First” signs.

He reiterated his previous claims that Democrats are purposefully targeting neighborhoods that lean Republican to house the pop-up migrant shelters.

He then added to the claims Friday, suggesting that some GOP politicians might also allow migrants to live among their constituents in exchange for some under-the-table perks.

“This is about the money. Follow the money,” Santos insisted.

The appearance at the outer borough shelter is a second for the 35-year-old Republican congressman, who rarely ventures out in his own district.

Shortly after the Queens Village shelter opened on Aug. 15, the Long Island rep blasted Mayor Eric Adams for taking a trip to Israel in order to run away from the migrant crisis at home.

Santos, however, did not partake in the original protest hosted by Sliwa outside the hospital the week earlier.

The Guardian Angels founder was just one of many people to get cuffed during the disruptive demonstration, which heard chants including “No tent city,” “Close the border,” “No migrants” and “America first.”

Sliwa refused authorities’ orders to get out of the middle of the street near the Creedmoor facility and was arrested as another protester waved a Trump 2024 flag in the background.

The Creedmore facility is just one of nearly 200 NYC emergency migrant shelters spread across all five boroughs.

New York City currently has nearly 60,000 migrants in its shelter system, with Mayor Adams estimating that the cost of housing and caring for the asylum seekers could balloon to $12 billion by 2025.