ETYMOLOGY
from wily (crafty, cunning, sly) + pie (a cunning, sly, or wily person, obs.)
EXAMPLE
“…So fiercely he fighteth, his mind is so fell,
That he driveth them down with dints on their day-watch;
He bruiseth their brainpans and maketh them to swell,
Their brows all to-broken, such claps they catch;
Whose jealousy malicious maketh them to leap the hatch;
By their cognizance knowing how they serve a wily pie
Ask all your neighbours whether that I lie…”
From: Divers Ballads and Ditties Solacious
The Ancient Acquaintance, Madam, Between us Twain
John Skelton, (1460? – 1529)
Lexicophilia 