Hair Bondage

The term refers not to restraining the hair, but using the hair as a bondage material to restrain the head.

Hammerlock

Wrists are crossed behind the back and pulled upward into the small of the back.

Handkerchief Codes

Gay color codes used to identify sexual preferences. Done by wearing a colored hankerchief in a back pocket.
Some of the codes in BDSM are:
Black: Paingames, Whipping; Dark Blue: Fucking; Brown: Shit; Grey: Bondage; Red: Fisting; White: Wanking; Yellow: Piss;
Which pocket is also important ie: left = top, right = bottom

Hardwood Floors

Clean-shaven pubic area.

Harness

Bondage apparatus consisting of a network of straps designed to form a web over a part of the body and restrict movement.

HD

A BDSM abbreviation for humiliation and discipline.

Also short for High Definition

Head (Give Head)

1. Oral sex, specifically performed on a man; FELLATIO.
2. The top part of the penis, the tip.

Heavy Rubber

Term used about some of the hardcore latex games like Multiple Layers, Breath Control, Medical Play.

Helmet

Circumcised.

Hentai

Japanese animation (anime) depicting graphic sexual scenes.

Hermaphrodite

Person with both male and female genitalia.

Hole In One

The act of sticking your dick in your own ass.

Hot Karl (ATM)

The act in which a person sucks the cock of the same man who moments earlier was performing anal sex.

Hummer

A blow job.

Hump

1. To have sexual intercourse.
2. To rub the genitals against each other without penetration or even while clothed.

Hustler

A prostitute, especially a male prostitute.