Post-Date Depression 

Usually occurring the day after you go on a date with your girlfriend/boyfriend when you feel extremely sad and lonely because you had such a fun time with that person and now you miss them a ton.

"So how was your hangout with Chloe last night?"

"Aw, man it was amazing, but I've got some serious post-date depression right now. I miss her like crazy. AHHH!"

Post-Date Depression by Fitz11 August 19, 2009

The Great Meme Depression 

Lasting from around May through June 2017 and on, memes have not been lasting and are low-tier memes. Most are normie-fied so the meme economy has been backed into a corner.

"Why have all the memes been shit lately?"
"It's because of The Great Meme Depression my dude."

The Great Meme Depression by Megoa June 27, 2017

Post camp depression 

An extreme feeling of sadness after summer camp is over. Nothing to do, nobody to talk to and you can’t do anything but just sit there are ball your eyes out.

Man this post camp depression is really hitting hard

Post camp depression by THC18469 August 14, 2019

definition depression

The feeling you get when your Urban Dictionary definition doesn't get published. This is caused by a bunch of faggots called editors who refuse to publish.

Person 1: Hey.
Person 2: I'm sad.
Person 1: Why?
Person 2: I've got the definition depression.
Person 1: Oh. I hate those damn editors, too.

definition depression by AFuckingMotherFucker January 2, 2012

Low-poly depression 

The sad, nostalgic feeling you get when you look at a childhood game and remember a point in life where you simply felt happy, knowing nothing will make you feel that way ever again.

Person 1: I miss when I used to play game as a kid. It just doesn't feel the same nowadays.
Person 2: Yeah, low-poly depression is a bitch.

Low-poly depression by blairswag June 11, 2021

Post Lord of the Rings Depression 

Being in a depressed state of mind after the Lord of the Rings film(s) end and you have to return to your own sh*t, boring life.

Guy: There's only one thing wrong with The Lord of the Rings; when it ends.

Guy 1: I watched lotr yesterday
Guy 2: Did you get post lord of the rings depression?
Guy 1: As always

Post Lord of the Rings Depression by Branwell Jäger November 27, 2013

dick depression 

Being emotionally conflicted because of the lack of dick or sexual activity, can affect social and academic life.

I didnt bother doing my homework last night because of my dick depression.

dick depression by Sandy squarepants October 3, 2017