A metaphorical list in which people who are in ill favor with a given individual are placed.

The horrible moment when you realise that you have accidentally done something very slightly wrong which has very bad (usually embarassing) implications for you. This is typically the moment of realisation that you just sent a dirty text message to a close member of family, typically your mother, rather than the intended recipient.

(n) a list of entities exhibiting general disfavorability, particularly as a result of transgression. Presumably these entities will not receive the normal benefits enjoyed by those not on the list.
(v) the act of placing someone on said list.

A list of people who have broken a rule or a regulation, disrespected an authority figure, or otherwise screwed up. If there is a job that needs doing but nobody else wants to do (i.e. a "shit job"), it is first given to the people on the shit list as a form of unofficial punishment.

This definition comes from the military where enlisted personnel who had pissed off their sergeant were the first ones picked for latrine duty; hence, "shit list."

A shit list is a mental list of things or poeple that have annoyed you recently. usually completed in a mental top 10 of annoyances for the most recent times and used as a public display of annoyance without offending people directly.

The list of banned, blacklisted.

If you don't like a person they are in your shit list AKA Hit List