1. Someone being or trying to be irritatingly clever; a smart alec
   - bright spark, smart-ass [N. Amer], smart-arse [Brit, Cdn], smartypants, smartie

Encyclopedia: Smarty

• unstimulating
• unstinted
• unstinting
• unstintingly
• unstirred
• unstop
• unstoppable
• unstoppered
• unstrain
• unstrained
• unstrap
• unstratified
• unstratified language
• unstressed
• unstring
• unstructured
• unstrung
• unstuck
• unstudied
• unstudious
• unstuff
• unstylish
• unsuasible
• unsubdivided
• unsubduable