Source : Webster's Revised Unabridged Dictionary (1913)

Grubby \Grub"by\, a. [From {Grub}.]
   Dirty; unclean. [Colloq.]

         The grubby game of marbles.              --Lond. Sat.
                                                  Rev.

Grubby \Grub"by\, n. (Zo["o]l.)
   Any species of {Cottus}; a sculpin. [Local, U. S.]

Source : WordNet®

grubby
     adj : thickly covered with ingrained dirt or soot; "a miner's
           begrimed face"; "dingy linen"; "grimy hands"; "grubby
           little fingers"; "a grungy kitchen" [syn: {begrimed}, {dingy},
            {grimy}, {grungy}, {raunchy}]
     n : small sculpin of the coast of New England [syn: {Myxocephalus
         aenaeus}]
     [also: {grubbiest}, {grubbier}]