[n] a person born in the generation following the baby boom when the birth rate fell dramatically
[n] a person (or thing) that breaks up or overpowers something; "dam buster"; "sanction buster"; "crime buster"
[n] a person who breaks horses
[n] a robust child
[n] an informal form of address for a man; "Say, fellow, what are you doing?"; "Hey buster, what's up?"