noun (n)

• an informal form of address for a man(noun.person)

  Example:
  Hey buster, what's up?.
  

  Synonym:
  dude, fellow
  

  source: wordnet30
• a robust child(noun.person)

  source: wordnet30
• a person who breaks horses(noun.person)

  Synonym:
  bronco buster, broncobuster
  

  source: wordnet30
• a person (or thing) that breaks up or overpowers something(noun.person)

  Example:
  Dam buster.
  Sanction buster.
  Crime buster.
  

  source: wordnet30
• a person born in the generation following the baby boom when the birth rate fell dramatically(noun.person)

  Synonym:
  baby buster
  

  source: wordnet30
• Something huge; a roistering blade; also, a spree.(noun)

  source: webster1913