F frequently used by gamers is a way to pay respect for your fallen comrad, it is also used to make fun of people for diying in a certain game.
Game: xX._.GamerBoi68419._.Xx was slain by NotABot807
Team-mate: DANG, F in the chat...
Other team-mate HAHAHAH, SUCH A NOOB, F in the chat.
F, or press F is slang for I’m sorry when somebody has passed away
Hey Bobby my grandma died. F. What the fuck Bobby, what is wrong with you?
A letter used to pay respects when something tragic happens
Friend #1: Nooo, I lose the game
Friend #2: F