Green’s Dictionary of Slang

a native of Manchester, UK.

1998		N. Palmer ‘Vegan Reich’ in Home Suspect Device 10: The mancs, scousers and fake-cockneys who all shouted about their roots.
2021		A. Parks April Dead 193: ‘You in Manchester?’ asked McCoy. Barnes nodded. [...] ‘Fucking shithole. Full of Mancs apart from anything else’.