Dead drop

Dead drop:local usado para troca secreta de itens entre duas pessoas que não podem ser vistas juntas ( espiões, traficantes, etc.)

 “ Spies have been known to use dead drops, using various techniques to hide the items and to signal that the drop has been made. Drug dealers use this as well.”  (www.urbandictionary.com)

"A dead drop avoids the need for an intelligence officer and a spy to be present at the same time"  ( www.dictionary.reference.com)