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bluff [1] 
  vb 
1 to pretend to be confident about an uncertain issue or to have undisclosed resources, in order to influence or deter (someone) 
  n 
2 deliberate deception intended to create the impression of a stronger position or greater resources than one actually has 
3 call someone's bluff to challenge someone to give proof of his claims 
  (C19: originally US poker-playing term, from Dutch bluffen to boast) 
 bluffer  n 

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