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1.
Calling someone a pie is another way of calling someone an idiot. When they've done something stupid, or annoying.
Pete just spilled his juice, what a pie.
by yaldy February 15, 2012
 
2.
A stupid, hardheaded, ignorant, ape-like person. Usually named Danny.
Jesse: where's apie?
Ariana: you mean danny?
by bob aka steemo'z nasties May 21, 2006