Meaning of “KuroRekishi(黒歴史)”
“KuroRekishi(黒歴史)” means an embarrassing past that one wants to forget.
“Kuro(黒)” means black and “Rekishi(歴史)” means history.
I think everyone has an embarrassing past especialy in one’s younger days. We call it “KuroRekishi(黒歴史)” because we want to black out the past.
Example Conversation on Twitter
A: I remember you used to wrap bandage on your left hand, what was that?
B: Ohhhhh…. Stop remembering it!!! it’s my “KuroRekishi(黒歴史)” !! I was chuuni byou(厨二病) at that time, I thought it’s cool!!