Dictionary

cocksure

adjective cock·sure \ˈkäk-ˈshr\

: having or showing confidence in a way that is annoying to other people

Full Definition of COCKSURE

1
:  feeling perfect assurance sometimes on inadequate grounds
2
:  marked by overconfidence or presumptuousness :  cocky
cock·sure·ly adverb
cock·sure·ness noun

Examples of COCKSURE

  1. <his cocksure assertion that he could bed any woman of his choice>
  2. <you're always so cocksure about everything>

Origin of COCKSURE

probably from 1cock + sure
First Known Use: 1608

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