What is the meaning of Smug?

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

Showing smugness; showing self-complacency, self-satisfaction.

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

To make smug, or spruce.

to adopt an offensively self-complacent expression.

To seize; to confiscate.

To hush up.

The smuggling trade.

in secret, hidden

Ulster form of smuga (mucus, snot)

an alley or alleyway

narrow strip of meadow or, less commonly, of a field or forest

any meadow, especially one that is marshy

Alternative form of smuga (streak, trail, contrail)

genitive plural of smuga

Source: wiktionary.org