transitive. slang. To touch or caress (a person, a part of the body) in order to excite sexually.

transitive. slang (chiefly British). To have sexual contact with; to fondle or caress intimately; (now esp.) to do this surreptitiously, without…

transitive. To stroke or fondle so as to arouse sexual pleasure.

In euphemistic use with reference to sexual acts. transitive (reflexive). To masturbate. Cf. to play with oneself at play, v. phrasal verbs 2.