It's quit often used in chats from the Streamingplatform Twitch if the streamer for example kills/rekt someone ingame. "Press 'F' to pay respects" comes from a Cod scene where you had to press f to pay respect.
Streamer: killed/rekt someone
someone writes: Press 'F' to pay respects
Chat spam: f
The 6. Letter of the Alphabet , but it has another use. When someone dies you can press F in the Chat.Wich honors them. Or the worst Grade you can get in School.
Press F in the Chat Boys.
F in the Comments
An F is a grade that you get when you get 50% or lower it means fantastic
wow you got an F I wish i got an F
To lazily pay respects or acknowledge problems.
"Hey did you hear David twisted his ankle during his soccer game?" "F's for him man."
F is used in the gaming community as a term for died or failed.
Me: oh I died F in the chat
Something you put in chat used by gamers as a signature way to say "feels bad man"