From Longman Dictionary of Contemporary Englishhandlebar moustachehan‧dle‧bar mous‧tache /ˌhændlbɑː məˈstɑːʃ $ -bɑːr ˈmʌstæʃ/ noun [countable] HBHa long thick moustache which curves upwards at both ends
Examples from the Corpus
handlebar moustache• He had no hair and a handlebar moustache that his face made look a foot long on each side.• He had a prominent handlebar moustache and a high colour to his cheeks.• Put on those flying goggles, tweak that handlebar moustache and blow the enemy to hell! 