Perv caught on tape grabbing woman’s butt in subway station

A pervy straphanger was caught on video grabbing a woman’s butt before darting out of a Manhattan subway station.

The groper could be seen on surveillance video as he feels up a 24-year-old woman’s behind, cops said.

The unwanted fondle took place at around 2 p.m. at the 51st Street and Lexington Avenue station on July 30, according to police.

“He’s a smooth operator,” a police source said about the suspect. “She looks like she made an attempt to hit him, but didn’t get him.”

The suspect was last seen wearing glasses and a sweater with yellow stripes.