I was told by the railroad to pick up a dead drop and I asked them what a dead drop is and Strong said "dead things always drop" I almost busted a gut laughing, what did your companion say?

It's a technique used by spies to pass messages. Instead of meeting face to face, one person leaves the message in a place known to both.

The other person knows to check that place periodically to see if anything has been left.

Rufffhhh rufffffhhhhh

really? Hancock said "a dead drop is when you push a body off an overpass, keep up"