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!"
by Fitz11 August 19, 2009
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Being with someone you don't particular enjoy spending time with, but makes things a little better in the long run.
I used to feel like absolute shit in my room at night but since I started depression dating Sarah, I've been eating dinner again.
by JayBlack November 26, 2018
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