masturbation

Etymology

Borrowed from French masturbation, New Latin masturbātiō, masturbātiōnem. Equivalent to masturbate + -ion.

noun

1. Manual erotic stimulation of the genitals or other erotic regions, often to orgasm, either by oneself or a partner.
   Masturbation is our first and natural form of sexual activity and if that's inhibited or damaged, then we suffer for the rest of our lives. (Betty Dodson)
   Masturbation is fun and natural. Not to mention it's a great way to earn five bucks without touchin' the guy. 2005, Jon Kimmel, Clum Babies (Drawn Together), season 2, episode 5, spoken by Foxxy Love (Cree Summer), via Comedy Central
2. (figurative) A vain activity.