jigger  
 noun [ C ] US uk/ˈdʒɪɡ.ər/ us/ˈdʒɪɡ.ɚ/
  (CONTAINER)     
  小量杯;一小量杯的酒
a small, round metal container used for measuring strong alcoholic drinks, or the amount of alcohol that this container holds
   (INSECT)     
 沙虱,砂蚤(同 chigger)
a  chigger 
 jigger       
verb [ T ] US uk/ˈdʒɪɡ.ər/ us/ˈdʒɪɡ.ɚ/
 (尤指不公正或非法地)改变
to change something, especially unfairly or illegally
  The ruling party jiggered the election results to stay in power. 执政党篡改了选举结果以继续掌权。