Sudoku

Sudoku is an online meme terminology that refers to the Japanese ritual suicide by disembowelment with a short sword. People purposely say Sudoku and not the actual term is Seppuku online as a meme since the actual Sudoku is a 9x9 digit puzzle.

Person 1:I'm kind of feeling depressed after this. I think ima perform Sudoku.
Person 2: Do you mean Seppuku?
Person 1:No it's Sudoku