craving for strange foods
• (n.) A depraved appetite; a desire for improper food.
Al`lo·tri·oph'a·gy (ăl`lo*trĭ*ŏf'ȧ*jȳ) noun [ Greek 
allotriophagia, allotriophagy A morbid impulse to eat unnatural foodstuffs; such as, ice, dirt, paint (including flaking paint), clay, laundry startch, gravel, plaster, or hair. This condition is known in medical fields as pica which comes from Latin meaning `magpie” (because this bird eats just about anything or carries away odd objects). Pica ...