cyberbully

noun

1. A bully who operates online, in cyberspace.

   “Typically, male cyberbullies use the computer more than the cell phone.”

verb

1. (transitive)To bully online.

   “Another Internet concern is cyberbullying. LGBT youth sometimes are the targets of harassment by persons (usually other students) who use the Internet...”

   “Around one-third of those being cyberbullied told no one about the bullying.”