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

Derived forms: bright sparks

• deformity
• defragment
• defragmentation
• defraud
• defrauder
• defray
• defrayal
• defrayment
• defrock
• defrost
• defroster
• deft
• deftly
• deftness
• defunct
• defunctness
• defuse
• defusing
• defy
• degas
• degauss
• degaussing
• degeneracy
• degenerate
• degeneration