1. (n.) A learned or wise man.

2. (n.) One who makes undue pretensions to wisdom; a would-be-wise person; hence, in contempt, a simpleton; a dunce.

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