Magic Marker
From Longman Dictionary of Contemporary EnglishMagic MarkerˌMagic ˈMarker noun [countable, uncountable] trademark a large pen with a thick soft pointExamples from the CorpusMagic Marker• The mailbox was one of the usual silvery aluminum boxes, with the numbers written neatly in Magic Marker, 22219.• The note is written in Magic Marker and thumb-tacked to her apartment door.• a sign written in red magic marker