Plural of grub: either the soft, worm-like larva stage of beetles and other insects, or (informally) food to eat.
Old English origin from grubbian meaning 'to dig or root out,' likely imitative of digging sounds. The insect meaning comes from their burrowing behavior; the food meaning is informal slang.
Grubs are absolutely nutritious—they have more protein per gram than beef, and indigenous peoples have eaten them for thousands of years, yet Western cultures still think they're gross!
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