buddy - definition and synonyms

noun [countable] 

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/ˈbʌdi/
singularbuddy
pluralbuddies
  1. 1
    mainly American informal a friend
  2. 2
    American spoken used for talking to a man whose name you do not know

    Hey, buddy, what are you doing?

  3. 3
    someone who forms an arrangement with another person in which they help each other