magic mushroom       
noun [ C ]  mainly UK uk/ˌmædʒ.ɪk ˈmʌʃ.ruːm/ us/ˌmædʒ.ɪk ˈmʌʃ.ruːm/
 致幻蘑菇
a type of mushroom that when eaten can cause hallucinations (= make you see things that are not real)
  Someone put magic mushrooms in the tea and everyone got high. 有人在茶里放了致幻蘑菇,大家都莫名兴奋起来。