Also found in: Idioms.
ball busteror ball·bust·er (bôl′bŭs′tər)
n. Vulgar Slang
1. A person, especially a woman, considered to be demanding or imperious, usually by a man.
2. A very difficult or demanding task or situation. In both senses also called ball breaker.
[From balls, testicles.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.