[smug] adj smug.ger ; smug.gest [prob. modif. of LG smuck neat, fr. MLG, fr. smucken to dress; akin to OE smoc smock] (1551) 1: trim or smart in dress: spruce
2: scrupulously clean, neat, or correct: tidy
3: highly self-satisfied -- smug.ly adv -- smug.ness n