hat hair

Noun

 * 1)  An accidental messy hairdo resulting from the wearing of a hat.
 * 2) * 2012 December 7, Zara, "The Measure: what's hot and what's not," Guardian (UK) (retrieved 13 March 2018) :
 * Beanie hair: Officially the worst hat hair to have: flat, fuzzy and drab.
 * Beanie hair: Officially the worst hat hair to have: flat, fuzzy and drab.