limpet

limpet
/ˈlɪmpɪt; `lɪmpɪt/ n
small shellfish that sticks tightly to rocks 帽贝
    cling, hold on, etc (to sb/sth) like a limpet, ie very tenaciously 紧紧依附、 缠住（某人[某事物]）不放.

牛津英汉双解词典