kingpin

名词 kingpin:

1. the most important person in a group or undertaking
   同义词：top banana, bigwig
2. bolt that provides a steering joint in a motor vehicle
   同义词：kingbolt, swivel pin
3. the front bowling pin in the triangular arrangement of ten pins
   同义词：headpin

1. He went from being a small-time hood to a mafia kingpin.
   他从不成气候的小太保慢慢混到黑手党的头儿。
2. He's the kingpin of the whole team.
   他是全队的主力。