past of SHAKE. --predic.adj. colloq. 1 (foll. by up) emotionally or physically disturbed; upset. 2 (foll. by on) Austral. & NZ keen on; enthusiastic about (not too shook on the English climate).
SHOOK
Meaning of SHOOK in English
English main colloquial, spoken dictionary. Английский основной разговорный словарь. 2012