Meaning

adjective marked by excessive complacency or self-satisfaction

originOriginally "spruce, neat," from Low German smuk (“pretty”), from Middle Low German smuk (“lithe, delicate, neat, trim”), although the g of the English word is not easily explained. The ultimate source should be Proto-West Germanic *smeugan (“to crawl, creep”). From the Low German derived also North Frisian smok, Danish smuk and Swedish smukk (now obsolete or dialectal). Compare also Middle High…

Etymology from Wiktionary, CC BY-SA 3.0