Lacing or cutting, are drug slangs for the act of using a substance (refereed by the slang terms lacing agent or cutting agent) to adulterate substances independent of the reason. The resulting substance are refereed by the slang terms laced or cut. Some street drugs are commonly laced with other chemicals for various reasons, but it is most commonly done so as to bulk up the original product or to sell other, cheaper drugs in the place of something more expensive. Individuals sometimes lace their own drugs with another substance to combine or alter the physiological or psychoactive effects.