A mate told me this years ago. Apparently it happened in the early 70's.In days gone folk could give as good as they got,
He was in a works van with a colleague who was a notorious racist & by all accounts an absolute dickhead.
They stopped in traffic near a bus stop. There was a black guy at the bus stop & Mr Dickhead shouted..."Why don't you f#ck off home you black c#nt!"...
The response was..."I'm trying to do exactly that man. But de f#ckin bus is late again!...
Now THAT is a comeback/put down line!