A light-hearted way of virtually paying respect online to someone's misfortune, originating from the meme "Press F to pay respects." Often misused.
"my grandmother just died... she was the best person i ever knew, and i really miss her..."
"F"
Lots of people will read this, so give some background information.
ffdhjduy ndnmfbfiuf hjjdef n jfjufr iemie fn