New York Consolidated Laws, Penal Law - PEN § 245.00 Public lewdness

A person is guilty of public lewdness when he or she intentionally exposes the private or intimate parts of his or her body in a lewd manner or commits any other lewd act:  (a) in a public place, or (b) (i) in private premises under circumstances in which he or she may readily be observed from either a public place or from other private premises, and with intent that he or she be so observed, or (ii) while trespassing, as defined in section 140.05 of this part, in a dwelling as defined in subdivision three of section 140.00 of this part, under circumstances in which he or she is observed by a lawful occupant.

Public lewdness is a class B misdemeanor.