Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Origin: Probably from Low German smuck 'pretty'

smug

adjective
     
smug
showing too much satisfaction with your own cleverness or success - used to show disapproval
smug about
What are you looking so smug about?
smug expression/look/face/smile etc
'I knew I'd win,' she said with a smug smile.
smugly adverb
smugness noun [uncountable]

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