Any
object or situation that is intensely disliked as a whole.
There is a subtle difference between using "hated" in this way, and in the traditional
use "it is hated (by many)". In this
case, "Hated" is used like the word "Hateful".
It's often used by itself, or as a one-word reply.
"I saw a cockroach run up the
wall! Hated."
"I got pulled over
today...."
"Ahhh.. Cops. Hated." (The
person is sympathizing with the one who got pulled over by saying how much he hates cops too.)