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

To make smug, or spruce.

familiar form of address or reference for Mr. Smug, which is (1) a character of S. J. Simon's marked by moderate skills, extreme overconfidence, and practical behavior at the table; (2) The Bridge World's computer.

marked by excessive complacency or self-satisfaction; "a smug glow of self-congratulation"