Post Harry Potter Sadness (also abbreviated as 'PHPT') is a mental condition where once an individual finishes watching/reading Harry Potter, they realize that the ships in Harry Potter are not together in real life and magic is non-existent as well since (almost) everything is scientific. Reportedly 95% of the people have this after finishing the series. Many try doing magic themselves, but doing so only disappoints them. PHPT can be temporary or everlasting. (PHPT occurs commonly in females on the realization that they cannot date 'Draco Malfoy')
"I just finished Harry Potter!"
"Oh, you'll have PHPT soon just like we all did."
"What's that?"
"Post Harry Potter Trauma."
"Oh."