mud·lark [muhd-lahrk] n. 1. Chiefly British . a person who gains a livelihood by searching for iron, coal, old ropes, etc., in mud or low tide. 2. Chiefly British Informal . a street urchin. 3. either of two black and white birds, Grallina cyanoleuca, of Australia, or G. bruijni, of New Guinea, that builds a large, mud… Continue reading Word of the Day: Mudlark