The line comes from Call of Duty: Advanced Warfare, released in 2014. During the opening funeral for Private William Irons, PC players are prompted to press F to salute the casket, and the moment's earnest staging made it an instant joke among players. Streamers began asking viewers for 'F in the chat' whenever something went wrong on stream, and the phrase escaped gaming entirely, becoming a universal shorthand for condolences, sincere or sarcastic. A decade later it remains one of the most typed reactions on livestreams.