zero haircut
n.— «Zerbin said she sees a lot of women seeking a change in their haircut who have what hair dressers refer to as a zero haircut, meaning the length is the same all around.» —“New Year New ‘Do” by Carrina Stanton Chronicle (Centralia, Washington) Dec. 29, 2008. (source: Double-Tongued Dictionary)
Further reading
Susan from Virginia Beach, Virginia, shares the phrase her mother used when the kids refused to eat: It’ll grow hair on your back teeth. This supposed motivator likely blends two older traditions: a German idiom, Haare auf den Zähnen haben...
To describe something tiny or insignificant compared with something vast, you might reach for phrases like a drop in the ocean or a drop in the bucket. In Mandarin, there’s an equally picturesque phrase that translates as nine cows, one hair, 九 牛 一...