It is lower class ghetto whore, that when used, is immediately discarded after uses (Like one would treat a condom or tampon)
Evan: I smashed Dana last night, wasn't all that great.
George: That drop dead chicken head
When someone is dating another when they could do way better.
Hey Sarah you dropped a head
Sarah- he's not that bad
a drop head is an crackhead/ skeeyee that lives in abandon places with its other drop heads
This abandon house is full of drop heads
Random stranger driving: "HEY WATCH WHERE YOUR GOING DROP HEAD"