Hashish is a cannabis

Cannabis (drug)

Cannabis, also known as marijuana among many other names, refers to any number of preparations of the Cannabis plant intended for use as a psychoactive drug or for medicinal purposes. The English term marijuana comes from the Mexican Spanish word marihuana...

 preparation composed of compressed stalked resin glands, called trichome

Trichome

Trichomes are fine outgrowths or appendages on plants and certain protists. These are of diverse structure and function. Examples are hairs, glandular hairs, scales, and papillae.- Algal trichomes :...

s, collected from the unfertilized buds of the cannabis

Cannabis

Cannabis is a genus of flowering plants that includes three putative species, Cannabis sativa, Cannabis indica, and Cannabis ruderalis. These three taxa are indigenous to Central Asia, and South Asia. Cannabis has long been used for fibre , for seed and seed oils, for medicinal purposes, and as a...

 plant. It contains the same active ingredients but in higher concentrations than unsifted buds or leaves. Hashish is often a paste-like substance with varying hardness and pliability, its color most commonly light to dark brown but varying toward green, yellow, black or red.

Hashish is heated in a pipe, hookah

Hookah

A hookah A hookah(Gujarati હૂકાહ) A hookah(Gujarati હૂકાહ) (Hindustani: हुक़्क़ा (Devanagari, (Nastaleeq) huqqah) also known as a waterpipe or narghile, is a single or multi-stemmed (often glass-based) instrument for smoking in which the smoke is cooled by water. The tobacco smoked is referred to...

, bong

Bong

A bong is a filtration device/apparatus generally used for smoking cannabis, tobacco,or other herbal substances.In construction and function a bong is similar to a hookah, except smaller and more portable...

, bubbler, vaporizer

Vaporizer

A vaporizer or vapouriser is a device used to extract for inhalation the active ingredients of plant material, commonly cannabis, tobacco, or other herbs or blends....

, hot knife

Spots (cannabis)

Spots "spotting","knifers", "knife hits", "knife tokes","dots", "hot knives", "blades", or "Bladers") are terms referring to a method of smoking cannabis . In this method, small pieces of cannabis are rolled to form the "spot"...

, smoked in joints

Joint (cannabis)

Joint is a slang term for a cigarette rolled using cannabis. Rolling papers are the most common rolling medium among industrialized countries, however brown paper, cigarettes with the tobacco removed, and newspaper are commonly used in developing countries. Modern papers are now made from a wide...

 mixed with cannabis bud

Bud

In botany, a bud is an undeveloped or embryonic shoot and normally occurs in the axil of a leaf or at the tip of the stem. Once formed, a bud may remain for some time in a dormant condition, or it may form a shoot immediately. Buds may be specialized to develop flowers or short shoots, or may have...

s or tobacco

Tobacco

Tobacco is an agricultural product processed from the leaves of plants in the genus Nicotiana. It can be consumed, used as a pesticide and, in the form of nicotine tartrate, used in some medicines...

 (the latter being more common in Europe and Africa), or cooked in foods.
It is believed that hashish originated in West Asia, where the cannabis plant was widely available.