guyliner Syllabification: (guy-lin·er)Pronunciation: /ˈgīˌlīnər/Definition of guyliner noun informal eyeliner that is worn by men:a glam rock singer with a banshee wail, guyliner, and black nail polishOrigin: early 21st century: blend of guy1 and eyelinerguyliner in other Oxford dictionaries Definition of guyliner in the British & World English dictionary