gagger definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a person or thing that gags; specif., a piece of iron to keep a core in place in a mold
gagger definition by American Heritage Dictionary
One that gags, as a piece of metal used to keep the core in position in a foundry mold.