GRUB

grub. Grub, n. a small worm, dwarf, dirty person

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Grub (?), v. i. [imp. & p. p. Grubbed (?), p. pr. & vb. n. Grubbing (�).] [[OE. grubbin., cf. E. grab, grope.]] 1. 1. To dig in or under the ground, generally for an object that is difficult to reach or extricate; to be occupied in digging.
2. 2. To drudge; to do menial work. Richardson.