Like a know-it-all (4)
I believe the answer is:
smug
(Other definitions for smug that I've seen before include "Twisted; quirky" , "goody-goody" , "Irritatingly pleased with oneself" , "Unpleasantly complacent" , "Unctuous" .)
I believe the answer is:
smug
(Other definitions for smug that I've seen before include "Twisted; quirky" , "goody-goody" , "Irritatingly pleased with oneself" , "Unpleasantly complacent" , "Unctuous" .)