Jek‧yll and Hyde /ˌdʒekəl ənd ˈhaɪd, ˌdʒekɪl ənd ˈhaɪd/
noun [countable][
Date: 1800-1900;
Origin: 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]
someone who is sometimes nice but at other times is unpleasant
[TahlilGaran] Dictionary of Contemporary English ▲