|smug /ˈsmʌg/ adjective|
comparative and superlative forms: smugger; smuggest
: 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 smugsmile/expression
— smugly adverb [more smugly; most smugly] • She smiledsmugly.
— smugness noun [noncount]