slick something ↔ down/back
From Longman Dictionary of Contemporary Englishslick something ↔ down/back phrasal verbSHINYto make hair smooth and shiny by putting oil, water etc on it His hair had been combed back and slicked down with something to make it neat. → slick→ See Verb tableExamples from the Corpusslick down/back• Michael had time to put Conker out before running in to wash his hands and slick his hair back wetly.