When you are having a nice time farming lane
and then a wild Fed Jungler appears while you are pushed too far https://49.media.tumblr.com/ec2742d0a11852f28e08b26afaad1ed9/tumblr_n53gifSXr31qcga5ro1_500.gif
and then a wild Fed Jungler appears while you are pushed too far https://49.media.tumblr.com/ec2742d0a11852f28e08b26afaad1ed9/tumblr_n53gifSXr31qcga5ro1_500.gif
Saying that in game would get you a chat restriction from or a ban from riot fyi, cuz thin skin
Yah, but lets assume you're, you know Screaming it at the top of your lungs IRL thinking it in your head for all intensive purposes.
It can depend on if you meant: Well fuck! I'm screwed! Players, Moderaters, even RIOTERS curse like this IN GAME and don't get banned. Context KINDA matters in a sense to some degree.
If you say something insulting to the enemy jungler and kinda directly meant to be ABOUT them (even if they can't see it) then yeah that would be reportable. First one is not reportable.
You can even check the Reporting a Player article in the Support section of the League of Legends website.