matchko noun a fish 19-20. Compare matchka etymology: Romany; possibly a development of Hindi muchlī with the same meaning; attested by Galloway Tinkler-Gypsies; also collected by Joseph F G S Lucas and Rev John Baird from Kirk Yetholm Gypsies note:

Grellmann (1787) collected the forms Matschu, Matscho with the same meaning from Continental gipsies. Smart & Crofton (1875) collected the forms Mátcho, Mátchi n., ‘Fish’ from English Gypsies.