a soft thick wormlike larva of certain beetles and other insects
"The child spent the entire afternoon digging for grubs in the garden soil to feed his pet birds."
An immature stage in the life cycle of an insect; a larva.
"The gardener carefully removed the green grub from the soil before it could damage his tomato plants."
search about busily
"The termites were busy grubbing through the old wood beneath the porch floorboards until they found a loose piece to chew up."
To scavenge or in some way scrounge, typically for food.
"After running out of supplies during the hike, we had to stop at the edge of the woods and grub through the leaves to find any edible mushrooms."