1. most self-satisfied or pleased with oneself in an annoying way
Usage: superlative form of smug

Examples

• He wore the smuggest expression after winning the debate.
• She gave the smuggest smile when her prediction came true.
• That was the smuggest comment I’ve ever heard.
• His smuggest moment was when he proved everyone wrong.
• The smuggest person in the room is usually the least popular.
• Even at her smuggest, she couldn’t hide her insecurity.