Green’s Dictionary of Slang

jailbait n.

1. (orig. US, also Alcatraz bait, bait, jailhouse bait, penitentiary bait) a young person, usu. a girl, who is under the age of sexual consent; having sex with such an individual is to invite a jail sentence.

[US]J.T. Farrell ‘Looking ’Em Over’ in Short Stories (1937) 48: She’s jail bait.
[US]Clara Smith ‘Ol’ Sam Tages’ 🎵 Remember if your gal is young, you’d better wait, / ’cause them’s the kind they call jailhouse bait.
[US]Howsley Argot: Dict. of Und. Sl. 37: penitentiary bait – a minor female.
[US]‘Bill O. Lading’ You Chirped a Chinful!! n.p.: Alcatraz bait: A girl under legal age limit.
[US]I. Shulman Amboy Dukes 23: A kid who was definitely jail bait.
[UK]J. Braine Room at the Top (1959) 182: I love you [...] I’m not interested in little girls. Particularly not in jail-bait like that one.
[US]C. Himes Imabelle 127: ‘Strictly penitentiary bait,’ he muttered angrily, thinking, It’s these high-yellow bitches like her that cause these black boys to commit so many crimes.
[US]J. Kirkwood There Must Be a Pony! 243: ‘Who-wee, Billy Jo, ain’t he cute?’ ‘Cutest lil’ ole jail bait I ever did see,’ Billy Jo squealed.
M. Allison ‘One of These Days’ 🎵 I’m gonna stop this foollin’, hangin’ out with jailhouse bait.
[UK]T. Keyes All Night Stand 16: Get out of that jailbait. She’s fourteen.
[US]T. Southern Blue Movie (1974) 147: Morty, that fucking chick is jail bait if ever I see it.
[SA]C. Hope Ducktails in Gray Theatre Two (1981) 45: jimmie: How old’s that dolly, Howellsie? [...] howellsie (reluctantly): Fourteen. bo-bo (gives shout of laughter): Jailbait!
[SA]B. Simon ‘Outers’ Born in the RSA (1997) 42: You’ll check when I bring Charmaine, jailbait man, fourteen years old, nice and fresh.
[US]L. Stavsky et al. A2Z 5/1: bait – n. an underage girl [...] Don’t hang with bait if you don’t want your ass in the lockup.
[UK]K. Sampson Awaydays 30: The young girls in the Chelsea, though, they’re pure jailbait.
[Aus]T. Winton ‘Boner McPharlin’s Moll’ in Turning (2005) 258: If I was Boner’s jailbait then at least I had somebody.
[US](con. 1950s) E. White My Lives 108: (of a boy) ‘I’m just seventeen now’ [...] ‘Gawd, real jailbait.’.
[UK]Independent (London) 19 Oct. 🌐 Explicit pictures of unsuspecting women and girls on forums with names like ‘Jailbait’ [etc.].
[US]T. Robinson Hard Bounce [ebook] ‘I wouldn’t have dry-humped the jailbait against the wall [...] That’s inappropriate’.

2. (US) a young person who is (seen as) a troublemaker and thus likely to be sent to prison.

[US] in E.J. O’Brien Best Short Stories of 1935 206: He thinks you’re a railroad dick and if he answers he’s jail bait.
[US]S. Longstreet Decade 214: A rough fellow, an hard bit of jail-bait.
[US]Laurents & Sondheim West Side Story I vi: Lissen, jail bait, I licked you twice and I can do it again.
[Ire]J. Morrow Confessions of Proinsias O’Toole 90: What would O’Lig do with helicopters? Who in that load of jailbait could —.
[Scot](con. 1980s) I. Welsh Skagboys 159: Nelly, whae’s goat another tattoo oan his coupon, an anchor oan the side ay his cheek! The daft cunt. —Fuckin jailbait, ah joke, pointin tae it.

3. attrib. use of sense 1.

[US]Mad mag. Sept. 15: Puberteena: Goddess of Jailbait Female Gymnasts.
[Scot](con. 1980s) I. Welsh Skagboys 387: Two antsy jailbait chicks are outside the Central, beckonin us ower.
[US]J. Ellroy Widespread Panic 41: Gary Cooper and a jailbait jill jumped into that bugged bedroom.

4. in fig. use, dangerous; of people, attractive but dangerous.

Gordon & Wood Jail Bait [film script] You know that gun is jail bait. I won’t go bail for you again [HDAS].
[UK]‘John le Carré’ Honourable Schoolboy 162: [of racehorses] None of your jail-bait chestnut with a light mane and tail that take the women’s vote in every race.

5. (US) a charge of statutory rape; also attrib.

E. Hemingway Islands in the Stream 25: I was telling Tom that I don’t know what they got you on but that it wasn’t jailbait.
[US]E. Sanders Family 51: To ward off possible jail-bait charges, the young Miss Lansbury carried around with her a to-whom-it-may-concern letter from her mother, OK-ing association with C.M.

6. in attrib. use, likely to lead to imprisonment.

[Scot]I. Welsh Decent Ride 35: There’s bams whae outline the maist pointless, ludicrous jailbait propositions, jist usually cause thir lookin die a bit ay adventure.
[Scot]I. Welsh Dead Man’s Trousers [35]: [of murder weapons] In a perfect world ah’d be able tae keep them, but thir jist jailbait.

In derivatives