Smug

1. Irritatingly pleased with oneself; offensively self-complacent, self-satisfied.
2. Showing smugness; showing self-complacency, self-satisfaction.
3. (obsolete) Studiously neat or nice, especially in dress; spruce; affectedly precise; smooth and prim.

Synonyms

• gloaty
• self-satisfied
• complacent
• arrogant