Green’s Dictionary of Slang

used as an oath or insult.

1994

P. Blauner Casino Moon 162: ‘Minchia! Where are we going here? What am I gonna do, act like I don’t know what’s going on in my own borgata?’ [ibid.] 246: Teddy looked at me with so much hate I could almost smell it. ‘Minchia,’ he said. ‘If I ever get a chance to meet God, I’m gonna ask him how he could take my only son and let a piece of shit like you live’.