Definitions from Wiktionary (grub)

▸ noun:  (countable) An insect at an immature stage of its life cycle.
▸ noun:  (uncountable, slang) Food.
▸ noun:  (Australia, slang) A dirty person.
▸ noun:  (Australia, slang) A despicable person; a lowlife.
▸ noun:  (obsolete) A short, thick man; a dwarf.
▸ verb:  To scavenge or in some way scrounge, typically for food.
▸ verb:  (ambitransitive) To dig; to dig up by the roots; to root out by digging; often followed by up.
▸ verb:  (slang, dated, transitive) To supply with food.
▸ verb:  (slang, dated) To eat.
▸ Also see grub

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