Jek·yll and Hyde /ˌdʒekəl ənd ˈhaɪd/ noun [countableC]
CHANGE/BECOME DIFFERENTsomeone who is sometimes nice but at other times is unpleasant 双重性格交替出现的人,具有善恶两重性格的人
Examples from the Corpus
Jekyll and Hyde• As he spoke, his language grew rougher and rougher, as if a Jekyll and Hyde transformation were taking effect.
OriginJekyll and Hyde
(1800-1900) The Strange Case of Dr Jekyll and Mr Hyde, a story (1886) by Robert Louis Stevenson about a man with a good character and an evil character