Know-It-All
[n] (informal) someone who thinks he knows everything and refuses to accept advice or information from others
Related Information
Related Terms
aggressively self-confident, biggety, braggart, bumptious, chesty, cocky, conceited, egocentric, egoist, egotist, immodest, individualist, narcissist, Narcissus, narcist, no modest violet, obtrusive, overwise, peacockish, peacocky, perk, perky, pert, puff