Examples from literature

• Even his grizzled hair slanted forward in a stiff cowlick over his forehead, and his face bristled sharply with his gray beard. 
• The cowlick where his hair parted kept a stubborn wisp of brown hair in rebellion, and it shook amusingly when he spoke earnestly or laughed. 
• The person addressed swung back the rebellious cowlick from his forehead, as if to clear his thinking faculties from a load while he considered the grave question.