The name Buster is a boy's name . Buster and is often added to lists like Badass Baby Names and discussed in our forums with posts like "The Makeover Baby Name Game".
From the experts:
An old-fashioned nickname in the Bud/Buzz/Biff mold; this one's kind of belligerent. Michelle Hicks and Jonny Lee Miller moved outside the box when they used it for their son--given the safer middle name of Timothy.