midlife crisis       
noun [ C ] uk/ˌmɪd.laɪf ˈkraɪ.sɪs/ us/ˌmɪd.laɪf ˈkraɪ.sɪs/  midlife crises
 中年危机
feelings of unhappiness, worry, and disappointment that some people experience at about 40 years old and that can sometimes lead them to make important changes in their life
 Compare: menopausemale menopause