Definitions of buster:

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

  Example: "Dam buster"

• noun:   a person who breaks horses
• noun:   a robust child
• noun:   a person born in the generation following the baby boom when the birth rate fell dramatically
• noun:   an informal form of address for a man

  Example: "Hey buster, what's up?"

• name:  A male given name (rare: 1 in 25000 males; popularity rank in the U.S.: #1068)
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #8408)