The to'baj was a type of animal, presumably native to Qo'noS. During QI'lop, there was a custom that involved a guest bringing a dish of stuffed to'baj legs (to'baj 'uS lughoDlu'bogh) to another person's home. In return, the guest was allowed to choose one item from that person's home to keep as their own. The origin of this custom is obscure. (tlhIngan Hol audiobook: Power Klingon) The IKV To'baj was likely named after this animal.