Maa Bhagwati's 2 'sahyoginis', Jaya and Vijaya who had killed the various Asuras and drank their blood, were still thirst for more blood. So Maa cut her own head and quenched the thirst of her sahyoginis with her own blood. Since then, Maa Bhagwati's this roop was called as Maa Chinnamastika or Mata Chinnamasta (Chinna is without and Masta is Head).
Maa Chhinnamastika's Dham or place or temple will be guarded by Lord Rudra Mahadev all sides. Hence this place has a perfect reasoning to be that Dham/ Temple. It has Mahadev's temple on all 4 sides East- Kaleshwar Mahadev Temple
West- Narahna Mahadev Temple
North- Muchhkund Mahadev Temple South- Shiv Bari Temple Hence this templeMata chinnamasta Temple.Further, Pandit Mai Das was a famous devotee of Maa Chinnamasta and worshipped Her till one day She gave him Her Darshan. The place was though called Chhabroh, however since Maa came and relieved Pandait Mai Das from all his tensions, this place got more popular by the name┬аChintpurni.