Brooklyn 99 depression is a complete sadness you feel when you have just finished Brooklyn 99. This type of sadness lingers for a few months and you never truly get over it. Brooklyn 99 depression (aka b9d) is very common in watchers of the series and once you have it - there is no going back. You will cry in your room for hours and nothing will ever make you happy again.
super fan:
i am so depressed, nothing is making me happy ever since i finished brooklyn 99
another person who has finished brooklyn 99:
Oh man! you definitely have brooklyn 99 depression