Sadhukaddi, a popular language of medieval India, is a vernacular dialect of Hindi/ Hindustani which is a mix of Hindi (Khariboli), Braj Bhasha, Awadhi, Bhojpuri and Rajasthani, hence it is also commonly called a Panchmail Khichadi.
It is common variant of Hindi and finds place in the literature of mediaeval poets in Hindi Literature like Kabir.