Cops are looking for a creep who urinated on a Brooklyn subway platform then slapped a woman on the butt.

The 27-year-old victim told police she spotted the suspect urinating behind a garbage can on the northbound platform of the Lorimer Street stop at around 10:30 am on March 25, according to a report.

She turned away from the gross spectacle, and the man ran up behind her and slapped her behind before fleeing towards a G train, cops said.

Police say the suspect is a Hispanic man around 18 years old, and was last seen wearing a black hoodie, blue jeans and white Adidas sneakers.