Green’s Dictionary of Slang

a coarse, and insulting intensifier, approx. equiv. to motherfucking adj.

1847		C. Campbell Rough Recollections I 149: ‘Thanks be to God,’ cried the old man, rising; ‘that it is you and that there are honest folk in your company; for these places have of late been polluted by Bhanchoot soors – cursed swine – or thieves’.
1848		M. Rafter Savindroog I 50: ‘Wallah, Billah, Tillah!’ exclaimed Hafiz, ‘we’ll teach the Banchoot dog to play at hide and seek round our little fingers’.
1988		S. Rushdie Satanic Verses 109: Mahound comes to me for revelation, asking me to choose between monotheist and henotheist alternatives, and I’m just some idiot actor having a bhaenchud nightmare, what the fuck do I know, yaar, what to tell you, help. Help.
2007		G. Narayanan [trans.] ‘Aadhavan’ in Paper Flowers 47: ‘I’m not afraid of these bahanchod fellows’.
2010		A. Kumar Nobody Does the Right Thing 22: ‘When I get out of this bahenchod place,’ he said, ‘I’m going to buy a phone agency in Patna’.