What a “Psycho”!

A Brooklyn man who turned down a deal that could have sprung him from jail might instead serve up to 83 years after a jury convicted him yesterday of stealing more than $100,000 in government benefits by dressing up as his dead mom.

Two videos of Thomas Prusik-Parkin’s wacky Norman Bates-like stunt — in which he wore a red dress and a platinum wig to pose as his mom — were aired for jurors during the grand-larceny trial.

“He maintains it wasn’t him in either video,” defense lawyer Morris Shamuil said. “He never impersonated his mother, never wore her clothing.”