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A besom is a broom, a household implement used for sweeping. The term is mostly reserved for a traditional broom constructed from a bundle of twigs tied to a stout pole. The twigs used could be broom (i.e. Genista, from which comes the modern name "broom" for the tool), heather or similar. The song "Buy Broom Buzzems" from Northern England refers to both types of twig. From the phrase broom besom ... Wikipedia