yonks
noun /jɒŋks/
  /jɑːŋks/
 [uncountable] (British English, informal, becoming old-fashioned)- a long time很长时间 - I haven't seen you for yonks!我很久没见你了! 
 词源1960s: origin unknown; perhaps related to donkey's years (see donkey).
- I haven't seen you for yonks!