Babyback - Petite, young, attractive Asian.
Bait and Switch - Person who shows up is a different one than advertised.
Baja Sur - Genitals. From the spanish "the low south".
Balloons - Breast implants
Bareback - Without a condom
Barracuda - A professional prostitute who's only purpose is to separate you from your money as quickly as possible, preferably without giving you anything in return.
Batin - (Malaysia) Groin massage, but sometimes means hand job.
BBBJ - Bare Back Blow Job (oral sex without condom)
BBBJTC - Bare Back Blow Job to Completion (oral sex to orgasm)
BBBJTCWS - Bare Back Blow Job to Completion with Swallowing
BBBJWF - Bare Back Blow Job With Facial
BBFS - Bare Back Full Service (sex)
BBW - Big Beautiful Woman
BCD - Behind Closed Doors
BDSM - Bondage, Discipline, Sado-Masochism.
Beret - A condom.
Beso Negro - Anal Rimming
BF - Boy Friend
Birdwatching - BBBJTCWS
BJ - Blow Job (oral sex on a man)
Blackhole - Anus
BLS - Ball Licking and Sucking
Blue Pill - Viagra
Blue Steel - Viagra
Brown Shower - Defecation on your partner.
BS - Body slide (Usually part of a "sensual massage". Where a woman slides her body on yours using oil.)
BSD - Big Swinging Dick
BSW - Black Street Walker
BTW - By the Way
Butterface - Everything looks good, but her face