[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?"
adult male, child, equestrian, fry, horseback rider, horseman, human, individual, kid, man, minor, mortal, nestling, nipper, person, shaver, small fry, somebody, someone, soul, tiddler, tike, tyke, youngster
\Bus"ter\ (b[u^]s"t[~e]r), n. Something huge; a roistering blade; also, a spree. [Slang, U.S.] --Bartlett.