From Longman Dictionary of Contemporary Englishcowlickcow‧lick /ˈkaʊˌlɪk/ noun [countable] HBHhair that sticks up on your head
Examples from the Corpus
cowlick• His hair was cut short with a cowlick dropping over at the front, like a freakster.• I can't brush this dumb cowlick down.• First, the cowlick had miraculously disappeared.• He still wears a sailor suit, the cowlick at his hairline gives his forelock a life of its own.Origin cowlick (1500-1600) Because it looks as if it had been licked by a cow 