1. One who is engaged in speculative mining or well drilling in areas not known to be productive.
2. A promoter of speculative or fraudulent business enterprises.
3. A worker who participates in a wildcat strike.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.