tapper

名词 tapper:

1. a tavern keeper who taps kegs or casks
   同义词：tapster
2. a person who strikes a surface lightly and usually repeatedly
3. a worker who uses a tap to cut screw threads
4. someone who wiretaps a telephone or telegraph wire
   同义词：wiretapper, phone tapper
5. a dancer who sounds out rhythms by using metal taps on the toes and heels of the shoes
   同义词：tap dancer