Bhīma is the strongest man on the field, and the Gītā calls him Vṛkodara, wolf-belly, as he blows his great conch Pauṇḍra. Of all his names, the one here is about his appetite.
Going deeper
1.14 shows Kṛṣṇa and Arjuna in their great chariot with white horses, blowing their divine conchs. 1.15 then names three conches: Kṛṣṇa's Pāñcajanya, Arjuna's Devadatta, and the great conch Pauṇḍra of Bhīma, who is described as one of terrible deeds. In the same line the Sanskrit calls Bhīma vṛkodara, wolf-belly, and bhīma-karmā, the doer of fearsome deeds. 1.16 continues with Yudhiṣṭhira's Anantavijaya, and with Sughoṣa and Maṇipuṣpaka, the conchs of the twins Nakula and Sahadeva. Each warrior gets a name for his conch and, here, a name for himself. The story points out that the epithet chosen for Bhīma is about his appetite. The Gītā does not explain it, so the verse is best read as a portrait in a roll call. See chapter 1.