slam dunker才对！
注意；expertise不用来指人，而是指专业知识和专业技术。
MerriamWebster词典：Etymology:French, from Middle French, expertness, from expert
Date:1868
1 : expert opinion or commentary
2 : the skill of an expert
Oxford高阶：expert knowledge or skill in a particular subject, activity or job:
用expert可以，但是太严肃。：）
另外请参考/slam-dunker+%22slam+dunker%22&hl=zh-CN&ct=clnk&cd=1等等...