“GHOTI GOROM” kaku — the Pied Piper of Kolkata

I still remember when the skyline of Kolkata used to turn into a riot of colours as the dusk descended, a familiar voice beckoned “Ghoti gorooooom, ghoti gorooooom…..” just like the Pied Piper of Hamelin. All through my childhood I never understood the meaning of the name, why is it “Ghoti gorom”? Whose “Ghoti” is…