Green’s Dictionary of Slang

a small, illustrated pornographic book.

1955		P.J. Barnes in Cttee on Judiciary 374: The most prevalent [pornographic literature] would be the type known to us, or in the language of the people who deal in it, as the Tijuana Bible, whichis a small booklet about 2 by 3 inches, of a cartoon type, that is very lewd and very obscene in its character.
1963		Sacramento Bee (CA) 11 Aug. 26/3: The clamor over the Dictionary of American Slang [...] whether it’s a Tijuana Bible (a pornographic item) or a real gasser (an exceptional work).
1979		G. Wolff Duke of Deception (1990) 117: The cards were kept in a cigar box with an eight-page Tijuana bible that spelled tit tut.
1989		H. Rawson Dict. of Invective (1991) 293: Tijuana Bible, a pornographic book.
1990		(con. c.1970) G. Hasford Phantom Blooper 146: My dream girl has turned out to be just another flat-chested hustler with a brassiere stuffed full of Tijuana Bibles.
2003		J. Lethem Fortress of Solitude 430: He manufactured custom porn, home made Tijuana Bibles.
2008		R. Price Lush Life 141: Assorted fetish magazines and reproduced Tijuana biles.
2011		H. Ellison Introduction in Pulling a Train’ [ebook] Schoolkids still read those little Tijuana Bibles, the eight page mini-comics featuring Joe palooka with a dick the size of a schooner’s mast.

diarrhoea, esp. when contracted on holiday.

1997

Roger’s Profanisaurus in Viz 87 Dec. n.p.: Tijuana cha-cha n. Diarrhoea. See sour apple quickstep.

(US gay) a Hispanic homosexual.

1972

B. Rodgers Queens’ Vernacular 29: Mexican homosexual [...] Tijuana queen (said of one especially trashy).

(US) a run to the lavatory when suffering a sudden attack of diarrhoea.

1972		B. Rodgers Queens’ Vernacular 197: Tijuana racetrack the diarrhea run from bed to bucket.
1986–7		Maledicta IX 59: Tijuana racetrack n [R] Diarrhea run; homosexual slang.

(US) a police car.

1975		L. Dills CB Slanguage.
1976		Humboldt Republican (IA) 21 Jan. 2/2: Tijuana taxi — Police car bristling with lights and markings.