@Ladybirdie00 Ok, I take it that you are seeking an explanation for both. I guess Śāktas will have a rich array of interpretations for both the epithets & image.
@Ladybirdie00 As far as image goes, what I have read is that the cutting of the head is the violent rise of the kuṇḍalini śakti through the suṣumṇā nāḍi, with the two devīs (omitting names here) representing iḍa & piṅgala nāḍis being nourished by this Śakti that flows out.
@Ladybirdie00 Properly initiated & erudite Śāktas can give more depth to these explanations. As for the epithets used, I’ll give a meaning with inspiration from the Śaiva Siddhānta Sampradāya (though the Devī & similar such imageries are not part of that Sampradāya).
@Ladybirdie00 Nara (man/human) is a subtle reference to Pum̐s (पुंस्, “man”) tattva / puruṣatattva, which refers to a bound soul’s essential state of being bound in limitations. Eating naramām̐sa/drinking nararakta is a reference to the Devī helping a soul transcend this bound nature.
@Ladybirdie00 While both Śaiva & Śākta systems share this insight, the Śaiva Siddhānta did not feel the necessity to use ferocious imageries to confer this insight while some Śāktas/later Śaivas saw a value in such images for the purposes of contemplation.
@Ladybirdie00 There is much that one may say about every detail in the image, including Chinnamastā holding the head in Her own hand but I will stop here.
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