Manual stimulation of your own genital organ for sexual pleasure.

synonym: self-stimulation.

Roget 374a: sex, sexuality, gender; male, masculinity, maleness etc. 373; female, femininity etc. 374.    sexual intercourse, copulation, mating, coitus, sex; lovemaking, marital relations, sexual union; sleeping together, carnal knowledge.    sex instinct, sex drive, libido, lust, concupiscence; hots, horns [Coll.]; arousal, heat, rut, estrus, oestrus; tumescence; erection, hard-on, boner.    masturbation, self-gratification, autoeroticism, onanism, self-abuse.    orgasm, climax, ejaculation.    sexiness, attractiveness; sensuality, voluptuousness.    [sexual intercourse outside of marriage] fornication, adultery.    [person who is sexy] sex symbol, sex goddess; stud, hunk.    one-night stand.    pornography, porn, porno; hardcore pornography, softcore pornography; pin-up, cheesecake; beefcake; [magazines with sexual photos], Playboy, Esquire, Hustler.    [unorthodox sexual activity] perversion, deviation, sexual abnormality; fetish, fetishism; homosexuality, lesbianism, bisexuality; sodomy, buggery; pederasty; sadism.    masochism, sado-masochism; incest.    ... show more