(Internet slang, especially anime and manga fandom) events or things from the past which one wants to whitewash/erase from history (due to it being embarrassing, poorly received, etc.); dark past

Berkshire pig

rye

rotary dial telephone / (slang) Kim Jong-un

black smoke

I don't speak Japanese

I'm a Muslim

I'm Jewish

will you marry me

A stock phrase in Japanese pop culture supposedly used by the wife in a newly-wed couple to invite her new husband to bed.