Carpet weed refers to small bits of cannabis flower that have fallen onto the floor, often when handling sticky buds. The term comes from scraping up any fallen crumbs as a last resort when your main supply is gone. While considered bottom barrel, some view collecting carpet weed as economical rather than simply wasteful. However, others find floor weed unappealing or hazardous to smoke given dirt and detritus picked up on the carpet. Overall, its value depends on personal standards and degree of cannabis scarcity. Letting usable flower go to waste is controversial in cannabis culture. But consuming grimy carpet weed poses health concerns. For many, this fate only befalls shake and crumbs. But some may meticulously gather, clean and smoke carpet weed if cannabis is scarce and funding limited.