grub /ɡɹʌb/noun 5verb 4forms 3phrases 3 noun5 •(slang) Food."The rice ration's down to nearly damn-all in the kampongs, but we keep finding dumps of grub in the forest." — 1958 •An insect, especially a beetle, at an immature stage of its life cycle. •(Australia, slang) A dirty person. •(Australia, slang) A despicable person; a lowlife. •(no longer used) A short, thick man; a dwarf.John Romane, a short clownish grub, would bear the whole carcase of an ox, yet never tugged with him. — 1609 verb4 •To dig; to dig up by the roots; to root out by digging; often followed by up.to grub up trees, rushes, or sedge •To scavenge or in some way scrounge, typically for food. •(slang, old-fashioned) To eat. •(slang, old-fashioned) To supply with food. formsgrubbed · grubbing · grubs Phrases with grub grub alongTo survive; to barely subsist. grub outTo eat a lot of food, especially comfort food. grub upTo pull (something) up by the roots; to uproot.