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A type of depression that is not easy to spot. People with high functioning depression will often look calm and collected on the outside, while facing a battle on the inside. People with high functioning depression will often be able to complete assigned tasks and manage a successful lifestyle while still being depressed.
Alex: Hey, I decided I need to tell you that I have high functioning depression.

Keegan: Really? But you look so happy and calm.
by AJ Quinn January 10, 2018
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