Dirt bed (Geom.), a layer of clayey earth forming a stratum in a geological formation. Dirt beds are common among the coal measures. -- Dirt eating. (a) The use of certain kinds of clay for food, existing among some tribes of Indians; geophagism. Humboldt. (b) (Med.) Same as Chthonophagia. -- Dirt pie, clay or mud molded by children in imitation of pastry. Otway (1684). -- To eat dirt, to submit in a meanly humble manner to insults; to eat humble pie.
Dirt, v. t. To make foul of filthy; to dirty. Swift.
Dirt"i*ly (?), adv. In a dirty manner; foully; nastily; filthily; meanly; sordidly.
Dirt"i*ness, n. The state of being dirty; filthiness; foulness; nastiness; baseness; sordidness.
Dirt"y (?), a. [Compar. Dirtier (?); superl. Dirtiest.] 1. Defiled with dirt; foul; nasty; filthy; not clean or pure; serving to defile; as, dirty hands; dirty water; a dirty white. Spenser.