buster (Noun) — An informal form of address for a man. ex. "Hey buster, what's up?"
buster (Noun) — A robust child.
buster (Noun) — A person who breaks horses.
buster (Noun) — A person (or thing) that breaks up or overpowers something. ex. "dam buster" ex. "sanction buster" ex. "crime buster"
buster (Noun) — A person born in the generation following the baby boom when the birth rate fell dramatically.