Like saying "I told you so" (4)
I believe the answer is:
smug
(Other definitions for smug that I've seen before include "Self-righteous" , "Smooth" , "Self-righteously complacent" , "Conceited and self-satisfied" , "Unctuous" .)
I believe the answer is:
smug
(Other definitions for smug that I've seen before include "Self-righteous" , "Smooth" , "Self-righteously complacent" , "Conceited and self-satisfied" , "Unctuous" .)