In Gita 1.15 Bhīma is called "bhīma-karmā vṛkodaraḥ", or something along the lines of "tremendous-deeds wolf-bellied".
Are there any particular stories about Bhima's tremendous deeds and voracious hunger behind this?
What is the case of "karmā"? It looks related to the root "karman" but doesn't seem to be identical to any case of its declension.