This Santa is on the very, very naughty list.

A married Santa Claus impersonator who sat “thousands and thousands of children” on his lap over the years has been nabbed in an undercover child sex sting

Thomas Allen Hicks, 68, a white-bearded professional Santa and preacher of 40 years, allegedly responded to an online ad posted by an undercover detective pretending to be a parent offering sex with their 13-year-old daughter, according to Polk County Sheriff Grady Judd.

Thomas Allen Hicks is a Santa Claus impersonator who has been nabbed in an undercover child sex sting Polk County Sheriff's Office

The accused predator was busted after agreeing to pay $200 and explicitly describing the sex acts he wanted to perform on the child — and grossly promising to be “gentle,” the sheriff’s office said.

“I talked to the real Santa Claus today, and he’s pissed,” Judd joked to reporters on Wednesday.

“He said, ‘It’s people like that who give me a bad reputation, and I spend all this time going all around the world…