smug 
/ˈsmʌg/ adjective
smug·ger; smug·gest /ˈsmʌg/ adjective disapproving : having or showing the annoying quality of people who feel very pleased or satisfied with their abilities, achievements, etc.
▪ It's OK to celebrate your success, but try not to be too smug about it. ▪ You can wipe that smug look off your face. ▪ a smug smile/expression
▪ It's OK to celebrate your success, but try not to be too smug about it. ▪ You can wipe that smug look off your face. ▪ a smug smile/expression
— smug·ly adverb [more smugly; most smugly]
▪ She smiled smugly.
▪ She smiled smugly.
— smug·ness noun [noncount]
