Post couple 

Fake couple; one is there to catch the rebound
Unrealistic

They aren't perfect they are a post couple

Post couple by ANONNNNNNNN December 30, 2014

Post Completion Depression 

When something that you have put a lot of time into recently is finally over (like the finale to a tv series that you love, or the end of a great video game trilogy) you are sometimes left melancholy, and with a feeling of "what do I do now". This lingering sadness is called "Post Completion Depression", though it's often shortened to P.C.D.

Anime enthusiast: So have you finished watching Kill la Kill yet!?
Casual anime fan: Yeah, it was great, in fact, I think I'm starting to get Post Completion Depression.

Post Completion Depression by LILJJH September 11, 2015

post malone complex 

Way of describing someone who looks like they smell based on appearance.

“Hes got that post malone complex. Yall smell somethin??”

post malone complex by fxnnodrama August 13, 2018

Post High School Complex 

Someone who immediately out of High School begins attempting to make up for their lack of former social standing. They commonly overcompensate by Buddy Whoring, and doing anything they can to hook up with previously unnatainable females.

Christopher, suffering from Post High School Complex, is 22 and has a particular interest in High School cheerleaders.

Post High School Complex by 3 zero 3 November 25, 2011