lunatic

Từ điển LongMan Dictionary

lu‧na‧tic/ˈluːnətɪk/ noun [COUNTABLE]
[date : 1200-1300; Language : Old French; Origin : lunatique, from Late Latin lunaticus, from Latin luna ( ⇨ lunar); because people thought mental illness was caused by the moon]
1. someone who behaves in a crazy or very stupid way – often used humorously:
　 ▪ This hotel is run by a lunatic!

2. old-fashioned a very offensive word for someone who is mentally ill:
　 ▪ a dangerous lunatic

3. the lunatic fringe
British English the small group of people in a political group or organization who have the most extreme opinions or ideas

—lunatic adjective [ONLY BEFORE NOUN]:
　 ▪ lunatic behaviour

noun
COLLOCATIONS FROM OTHER ENTRIES
lunatic asylum
raving lunatic
▪ a raving lunatic
EXAMPLES FROM OTHER ENTRIES
▪ Some lunatic came into the store and shot him.
EXAMPLES FROM CORPUS
▪ The boy and girl probably thought he was a lunatic.

• Từ đồng nghĩa / Synonyms:
  moonstruck, daredevil, madcap, hothead, swashbuckler, harum-scarum, madman, maniac