Jack gagger: a husband that procures men to pay for sex with his wife
Jacking Off: to masturbation
Jactitation: a false boast that causes harm to others, sometimes sexual
Jail-bait: reference to an individual who is under 18 years of age.
Jealous: resentfully envious or suspicious of rival influences.
Jealousy: negative, angry feelings that a group or an individual can provoke in another group or individual; neurotic anxiety based on fear of losing control over a partner one regards as a possession
Jerk(ing)-off: to masturbate.
Jilling: female masturbation.
Jock lesbians: aka "Jockettes," a derisive term towards are women who win at sports,
Jocker: a male homosexual
John: a person who pays for sexual favors
Joint: the penis
Juvenilism: dressing or acting out role of a juvenile, sometimes sexual