Body parts
Penis
Erect
bone, boner, hard-on, presidential staff, stick, wood, woody, stiffy
Flaccid or Erect
arrow, bishop in a turtleneck, blue-veined microphone, chode, Clyde, cock, crank, dick, dong, egg roll, hog or hawg, johnson, john-thomas, knob, lad (Irish), love snake, manmeat, meat, member, mushroom cap, old fellow, one-eyed monster, one-eyed snake, pecker, Pedro, Peter, Percy, plum (of the head only), pork hammer, pork sword, prick, purple-headed (something), rod, scepter, schlong, shaft, snopp, Stanley (the power tool), talliwhacker, todger, tool, trouser snake, trouser trout, unit, wang, warrior of love, wiener, willie, yogurt slinger
Testicles
balls, bollocks, cods, family jewels, knackers, plums
Also "plum smuggling" a colloquial term used to describe a male wearing overly tight undergarments, allowing the penis/ testicles to be seen in outline.
Breasts
baps, boobs, bristols, cans, fun-bags, guns, headlights, honkers, hooters, jugs, knockers, meat puppets, melons, rack, sweater meat, ta-tas, tits
Vagina
bearded clam, beaver, box, clam, coot, cunt, fanny (British English; in the US, a non-obscene word for posterior), furburger, gap, meat curtains, muff, pussy, snapper, tuna, twat, gash, coochie, pink taco, poon, poontang, punani, rug, slit, snatch, sweet spot, tweety bird, vertical smile, whisker biscut, winky, sausage walle
Perineum
taint, grundle
Posterior
ass or arse, back, batty, behind, booty, bum, bung, butt, fanny (US English; in British English it means vagina), kaboose, pooper, rear end, rump, tush
Anus
asshole or arsehole, balloon knot, bunghole, buttery cornhole, brown eye, chocolate starfish, crack, nether region, Oxo Tower, poop chute
Foreplay
get it on, get off (with), make out, necking, petting, feel up, reaching second base (of three), touch up
Kissing
snog, tonsil-tennis, snogging, pashing, making out, sucking face, smooching, swapping spit, (in) a lip-lock
Oral Sex
Many sexual-slang verbs for oral sex
are simply "eat", "bite", "blow", "suck", "chew" or a verb suggesting them, followed by a noun suggesting genitalia,
involve little creativity, and
while immediately understandable, have little currency.
General
going down, giving head, eating him/her (out), eating it, going south
Cunnilingus (Oral sex on female)
wet-velveting, carpet munching, muff diving, mustache ride, lick-out, eat out, pearl diving, giving head, chawing box, tipping the velvet
Fellatio (Oral sex on male)
sucking cock, blow, suck off, blowjob, slobbing the knob, waxing the lance, slurping the bishop, tonsil exam, shine, fluff, eat, smoking the pole, blowing rock
Anal Intercourse
taking it up the poopchute, going in the out door, dancing with bubba, fudgepacking, butt ****, butt sex, riding the Hershey highway, shit packing, spooning, taking it up the ass.
Semen (Ejaculation)
gentlemen's relish, number 3, load, spew, donut glaze, cum, spunk, jizz, gizzum, seed, cream, hot man mustard, squirt, goo, spunk, splooge, love juice, man cream
Masturbation
Male
yanking the crank, jacking off, jerking off, choking the chicken, tossing off, wanking (off), whacking off, spanking the monkey, flogging the dolphin, beating the bishop, polishing the helmet, strokin' the pole, shaking hands with the sheriff, ****ing off, beating the meat, frigging (off), doing the shandy shuffle, playing tug-of-war with cyclops, crack one off, pocket billiards
Female
diddling, fingering, finger****ing, frigging (off), jilling off, walking the kitty
Homosexuality
Male
(many terms derogatory, unless used by homosexual men about themselves)
gay, queer, poof, fag, faggot, queen, shitshover, shirt-lifter, pillow muncher, uphill gardener
Female/ Lesbian
(derogatory, unless used by homosexual women about themselves)
dyke, lezzer, rugmunchers
Prostitute
promiscuous woman, slut, sex worker, call girl, white slave, model, escort, masseuse, tart, pro, moll, brass nail, tom, woman on the game, working girl, member of the oldest profession, tramp, floozie, scrubber, slapper, slag tart, prossie, brass, hooker, ho, hustler, roundheel; dated streetwalker, woman of the streets, lady/woman of the night, scarlet woman, fallen woman, woman of easy virtue, cocotte, wanton, loose woman, courtesan, strumpet, harlot, trollop, woman of ill repute, lady of pleasure, Cyprian, doxy, drab, wench (also used for any lower-class woman, e.g. "serving wench"), quean, trull.
Venereal Disease
clap, pox, (to catch) a dose, crotch rot
Pedophilia
forbidden fruit, kiddie-fiddler, spring chicken