Informal Something that surpasses or completes what has gone before; a finishing touch or finale.(noun)
Slang One who acts as a decoy, as in a confidence game.(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.
Use "capper" in a sentence
"The capper is a 7-yard pass to Wes Welker, putting New England up early, and planting that seed of doubt into the minds of Broncos fans."
"The capper is a deposition that was given by the cameraman for the footage some years ago."
"The capper is a call that Jimmy says he made to Johnny at home that night because “Greenberg was a meatpacker who was treating him like a piece of dirt.”"