Definition of "jackhammer" []

• A hand-held machine for drilling rock and breaking up pavement, operated by compressed air. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I think I went to college with Ed Martin jackhammer"
• "“Working a jackhammer is a noble profession,” John said."
• "I had never experienced that kind of jackhammer pain before, and I had to endure it until Monday rolled around when I could find a dentist to see me."