The Collaborative International Dictionary of English v.0.48:
Grimy \Grim"y\, a. [Compar. Grimier; superl. Grimiest.] Full of grime; begrimed; dirty; foul. [1913 Webster]WordNet (r) 3.0 (2006):
grimy adj 1: 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, grubby, grungy, raunchy]