leech
noun [ C ] uk/liːtʃ/ us/liːtʃ/
水蛭，蚂蟥
a type of worm that lives in wet places and fastens itself onto the bodies of humans and animals to feed on their blood
disapproving（指人）吸血鬼，寄生虫
a person who gives attention to someone over a long period in order to get their money or support