Press F to Pay Respects: What Does F Mean Online?

Has someone ever replied to you with a single letter "F"?

Call of Duty Black Press F Hoodie - Call of Duty Store

The F in the Chat, Press F to Pay Respects

press f to pay respects

What is the meaning and origin of 'Press F to pay respect'? - Quora

Nintendo Switch Online - Every NES, SNES, N64, Sega Genesis, Game Boy, And GBA Game Available

What does Press F mean? Please Press F to Pay Respects

What does 'F' mean in Internet slang? - Quora

Press F for coffin dance : r/memes

Press F to Pay Respects