Source : Webster's Revised Unabridged Dictionary (1913)

Grimy \Grim"y\, a. [Compar. {Grimier}; superl. {Grimiest}.]
   Full of grime; begrimed; dirty; foul.

Source : WordNet®

grimy
     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},
            {grubby}, {grungy}, {raunchy}]