ma vaffanculo
A fancy Italian way to say I'm going to punch your face until it looks like a tomato.
My uncle said 'ma vaffanculo' when my cousin spilled wine on his suit.
My neighbor yelled 'ma vaffanculo' when I borrowed his lawn chair and never returned it.
My friend said 'ma vaffanculo' when I told him I was going to beat him up for stealing my pizza.