Hashish oil, also known as cannabis oil, is a concentrated substance derived from the resin of marijuana plants. It is often used recreationally for its strong psychoactive effects. However, due to its illegal status in many parts of the world, people often use synonyms to refer to it. These synonyms include cannabis extract, hash oil, BHO (butane hash oil), wax, shatter, dab, honey oil, and crumble. Some of these synonyms refer to specific methods or consistencies of producing the oil, such as wax or shatter, while others simply refer to the substance itself, such as cannabis extract or hash oil.