Know-it-all

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Know-it-all \Know"-it-all`\, n.
     One who knows everything; hence, a person who makes
     pretension to great knowledge, especially one whose didactic
     conversational habit conspicuously reveals his belief that he
     has superior knowledge on many subjects; a wiseacre; a
     know-all; -- usually ironical. [Colloq. & pejorative]


  
     Note: the use of this term implies that the speaker
           disapproves of this behavior, and may think that it is
           unjustified
           [1913 Webster +PJC]

From WordNet (r) 2.0 [wn]:

  know-it-all
       n : someone who thinks he knows everything and refuses to accept
           advice or information from others [syn: {know-all}]

From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:

  38 Moby Thesaurus words for "know-it-all":
     Narcissus, aggressively self-confident, biggety, braggart,
     bumptious, chesty, cocky, conceited, egocentric, egoist, egotist,
     immodest, individualist, narcissist, narcist, no modest violet,
     obtrusive, overwise, peacockish, peacocky, perk, perky, pert,
     puffed up, self-conceited, self-opinionated, smart aleck,
     smart-alecky, smarty, smarty-pants, stuck-up, swelled-headed,
     swellhead, wise guy, wiseacre, wisecracker, wisehead,
     wisenheimer