F12 Moment
A moment so good or so bad you feel the need to take a screenshot, even though you're probably going to forget about it in 5 minutes.
I got a perfect score on a game and F12'd it, then immediately forgot about it.
My friend got stuck in a wall and I F12'd it because it was so funny.
I lost my whole team and F12'd it because I was too proud to admit I was bad.