What is the meaning of Grub?

An insect at an immature stage of its life cycle.

Food.

A dirty person.

A despicable person; a lowlife.

A short, thick man; a dwarf.

To scavenge or in some way scrounge, typically for food.

To dig; to dig up by the roots; to root out by digging; often followed by up.

To supply with food.

To eat.

singular preterite of graben

nonstandard form of grup

rough, coarse

rude

Source: wiktionary.org