The phenomenon of becoming depressed during bed time. Usually in bed thinking about life and/or love.

May be the only time depression manifests for that person.
Ben : "Hey Carl, How did you sleep last night?"
Carls: "Not so good man, I had some mad pillow depression. Kept me up all night."
by TheCheeksoftheD August 24, 2017
Get the Pillow Depression mug.