pica

an abnormal craving for and eating of substances (as chalk, ashes, or bones) not normally eaten that occurs in nutritional deficiency states (as aphosphorosis) in humans or animals or in some forms of mental illness —compare GEOPHAGY
Cletus, how many times do I have to tell you to lick that knife off afore you stick it back in the butter. Land sakes, boy, you best be-have or they'll make you mayor of Pangburn.
Pica: if one person does it it's sick but if thousands do it it's an affirming cultural experience
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Vernix caseosa

1. is the "waxy" or "cheesy" white substance found coating the skin of newborn humans. It is secreted by the fetus's sebaceous glands in utero, and is hypothesized to have antibacterial properties."Vernix" is the Latin word for "varnish." The vernix varnishes the baby. "Caseosa" is "cheese" in Latin

Vernix is composed of sebum (the oil of the skin) and cells that have sloughed off the fetus' skin.

2. For the town in France, see Vernix, Manche - commune of the Manche département, in France.
I'll have the parma ham and Vernix caseosa on rye, lightly toasted with a side of potato salad and green onion
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