overdoer

/ˌoʊvərˈduːər/
noun
  1. A person who tends to do things to an excessive degree, especially in work or effort.
    • The coach warned the team not to be overdoers and to pace themselves.
    • As an overdoer, she always takes on more tasks than she can handle.
    • My boss is a classic overdoer who never knows when to stop working.
What does "overdoer" mean? | whatsthatwordmean | whatsthatwordmean