Urban Dictioninary defines ‘Keyboard Warrior’ as A Person who, being unable to express his anger through physical violence (owning to their physical weakness, lack of bravery and/or conviction in real life), instead manifests said emotions through the text-based medium of the internet, usually in the form of aggressive writing that the Keyboard Warrior would not (for reasons previously mentioned) be able to give form to in real life. 

The anonymity of the internet has created an environment were anybody can say anything they want to any other person behind the protection of monitor and keyboard. But in some rare cases, that person eventually gets what is coming to them.

The odious Charlie Zelenoff subjected Olympic medalist Deontay “The Bronze Bomber” Wilder to years of abuse over social networks. Then Wilder actually accepted Zelenoff’s challenge to a fight. It went about how you would expect.