Sunday driver
From Longman Dictionary of Contemporary EnglishSunday driverˌSunday ˈdriver noun an insulting word for someone who annoys other drivers by driving very slowly and carefully, as if he or she only drives on Sundays on pleasure trips Sorry I’m late – I got stuck behind a Sunday driver!Sunday driverSunday driverTTCINSULTan insulting expression meaning someone who annoys other people by driving too slowly → SundayExamples from the CorpusSunday driver• Too many Sunday drivers for my liking.• He has the settled attitude of the Sunday driver.