Meaning

noun informal terms for a meal

noun a soft thick wormlike larva of certain beetles and other insects

verb ask for and get free; be a parasite

originFrom Middle English grubben, grobben, from Old English *grubbian, from Proto-West Germanic *grubb-, from Proto-Germanic *grubb- (compare Middle Dutch grobben (“to scrape, scramble, grab”), Old High German grubilōn (“to dig, search”), German grübeln (“to meditate, ponder”)), from Proto-Germanic *grub- (“to dig”) (see *grabaną). The noun sense of "larva" is from Middle English grub, grubbe, grobbe,…

Etymology from Wiktionary, CC BY-SA 3.0