“Psychopath,” “con man” and “sick dude” — these are a few of the choice words former NYPD Commissioner Bernie Kerik has for a onetime pal who’s now accused of running a sex cult.

“He was a con man, he manipulated people, he lied about people,” Kerik said of Lawrence Ray, 60, who is accused of enslaving his daughter’s dorm-mates at Sarah Lawrence College, including one he allegedly sex-trafficked.

Ray had portrayed himself as a law-loving ex-Marine when they met in 1996 — all lies, Kerik said.

“He mimicked what I would say,” Kerik recalled.

Ray was best man at Kerik’s 1998 wedding, and the two men dined out often with their wives.

But Kerik learned Ray was being probed by the FBI, and he cut ties. The last time they spoke, in 2000, Ray called Kerik at 2 a.m. to say, “I just got stopped on the Verrazzano by a cop and he doesn’t believe I know you.”

Kerik says he hung up without helping.

Kerik believes that in 2004, Ray dropped a dime on him in retaliation. The resulting FBI investigation ultimately landed Kerik in prison for three years for tax fraud.