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crack-up - 1 dictionary result
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crack·up or crack-up   (krāk'ŭp')   
n.   Informal
  1. A crash, as one involving an airplane or automobile.
  2. A mental or physical breakdown.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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