Pencil moustache
A thin, neatly clipped line of moustache just above the upper lip.
Also: pencil mustache
A pencil moustache is trimmed to a narrow line along the top of the lip, sometimes with a gap in the middle under the nose. It was the look of many Hollywood leading men in the 1930s and 1940s. It needs close daily trimming. Barbers say it sits well on oval and oblong faces and on people with a wide upper lip.