यातयामं गतरसं पूति पर्युषितं च यत्। उच्छिष्टमपि चामेध्यं भोजनं तामसप्रियम् ॥

yāta-yāmaṁ gata-rasaṁ pūti paryuṣhitaṁ cha yat uchchhiṣhṭam api chāmedhyaṁ bhojanaṁ tāmasa-priyam

That which is stale and flat, putrid and corrupt, leavings also and unclean, is the food dear to the dark.

In plain words: Dull, lazy people like food that is stale, tasteless, rotten, leftover or dirty.