smugger

/S M AH1 G ER0/
adjective
  1. 1

    Irritatingly pleased with oneself, offensively self-complacent, self-satisfied.

    โ€œKate looked extremely smug this morning.โ€

  2. 2

    Studiously neat or nice, especially in dress; spruce; affectedly precise; smooth and prim.

Source: https://en.wiktionary.org/wiki/smug, https://en.wiktionary.org/wiki/smugger