Source : Webster's Revised Unabridged Dictionary (1913)

Buster \Bus"ter\ (b[u^]s"t[~e]r), n.
   Something huge; a roistering blade; also, a spree. [Slang,
   U.S.] --Bartlett.

Source : WordNet®

buster
     n 1: an informal form of address for a man; "Say, fellow, what
          are you doing?"; "Hey buster, what's up?" [syn: {fellow}]
     2: a robust child
     3: a person who breaks horses [syn: {broncobuster}]
     4: a person (or thing) that breaks up or overpowers something;
        "dam buster"; "sanction buster"; "crime buster"
     5: a person born in the generation following the baby boom when
        the birth rate fell dramatically [syn: {baby buster}]