What do you define as "Toxic"

On its own? No. But if you have a history of toxicity and negative behavior, you can be banned for it.

I was banned for two weeks for calling people bronze and wooden. since then i've even stopped calling any sort of negative names people cause i'm too afraid to get banned. they can ban you for anything this days it's really god dam scary. the other game i wrote 2 messages the entire game. 1 in the mid game responding to enemy top lane who was talking shit. i just said why are you mad and the second message was at the end of the game. just asking for everyone to report my team. then after all the insults in the entire game. he wrote me i'm reporting you for toxic behavior

does anyone of it considered toxic behavior?

If you play anything with more than 2 dashes I assume you're going to be VERY toxic.

Wow I just noticed the correspondence between mobility and toxicity.

Riot defines toxic by the way. Any negativity is considered punishable according to Riot. Emphasis on "any".

I think we should have thicker skins to be honest. Stealing money out of summoners pockets over what they said isn't just deserts -its revenge. The intentions aren't noble. I actually quite league until the tribunal recognizes the unethical nature of it. Once they limit reports to cheating, feeding and afk's, I may consider coming back to the rift. But once they banned my 7 season old, 300 days of gametime, 100's of dollars of skin account, over flaming 2% of my matches, I quite.