musiker, musker, muskrer noun a policeman 20. Compare muskries etymology: probably from Romany muskero, mooshkero ‘a constable’; form muskrer also attested in Shelta; form musker attested by BS in TDITA; collected by EMcC/PS note:

Smart & Crofton (1875) collected the form Moóshkero n., ‘a constable’ from English Gypsies.

Canadian Paul Pope (2013) attests the form with the same meaning.