cyberbully
/ˈsaɪbərbʌli/Definitions
1. noun
a person, typically a teenager or young adult, who uses the internet or other digital technology to intimidate, harass, or bully others
“The school counselor spoke to a cyberbully who had been sending threatening messages to a classmate online.”
2. verb
to use the internet or other digital technology to intimidate, harass, or bully someone
“Some parents worry that their children will be cyberbullied by their peers online.”
3. verb
to intimidate, harass, or bully someone using the internet or other digital technology
“The government is working to stop cyberbullying and make the internet a safer place for everyone.”