Buster
Buster was a nickname.

In 1986, after James T. Kirk assured her he and Spock were trying to help George and Gracie, Gillian Taylor retorted, "The hell you were, buster." ()

In 2268, Leonard McCoy shouted, "You tell him, buster" to the gladiator  after the 892-IV native encouraged Spock to fight. ()

Later that year, after Captain Kirk told Jojo Krako that the crew of  numbered over four hundred, Krako taunted, "That's your story, buster." ()

See also
 Buster Kincaid

Nicknames