omission of s before: Barber shop, butcher shop, tailor shop, &c. This is very frequent. Compare butcher-knife, doctor-stuff.
[1853. Doctor-stuff. See SLICK.]
1858. I found copies stuck upon every blacksmith shop. [See DOGGERY.]
[1888. A short butcher-knife, thrust into a home-made leather case, kept company with the pistol.Mrs. Custer, Tenting on the Plains, p. 475. See also BUTCHER-KNIFE.]