Which term refers to a tuft of hair that stands straight up?

The term that refers to a tuft of hair that stands straight up is "cowlick." This phenomenon occurs when a section of hair grows in a different direction from the surrounding hair, causing it to stand upright. Cowlicks are typically found at the crown of the head or at the hairline and can vary in strength and prominence.

Understanding cowlicks is important for hairstyling and cutting because they can affect how a style falls and how hair can be managed. Stylists often need to consider the presence of cowlicks when creating cuts and styles, ensuring they work with the natural direction of the hair.

The other terms represent different concepts in hairstyling and do not specifically denote a tuft of hair standing straight up. "Fringe" refers to hair cut straight across the forehead; "quiff" is a hairstyle that involves styling hair upwards and away from the forehead; and "spike" can describe a style where the hair is styled to stand upright but is not necessarily a naturally occurring tuft like a cowlick.