Concentrates, also known as hash oil, hashish oil, butane hash oil, honey oil, wax, shatter, or crumble, is an oleoresin obtained by solvent extraction of marijuana and/or hashish.

Hash oil is consumed usually by smoking, ingestion, or vaporization. Vaporizing hash oil is known colloquially as "dabbing", from the English verb to daub (Dutch dabben, French dauber), "to smear with something adhesive". Dabbing devices include special kinds of water pipes ("oil rigs"), and vaporizers similar in design to electronic cigarettes.

Hash oil is very lipophilic and may penetrate the skin like a transdermal patch.