Ok this is tricky!!
"A piecost is a bird (related to the crow and unafraid of humans)... "
"Definition of PIECOST in the list of acronyms and abbreviations provided by the Free Online Dictionary and Thesaurus."
"> Next time you take a dip in Lake Powell, think about the huge piecost that may be lurking underneath you in the murky depths. What's a piecost?? You can pick one up at Marie Callenders for 5.99!!! " (Think this is meant to be a silly one)
"Probability of Incurring Estimated Cost."
Still not entirely sure of this one now. . . if it turns out to be a really funny joke then I'll consider it worth looking stupid for and doing this stupid search. . . .