(v. tr.) To publicly shame a wrongdoer via website, blog, email, or other publication in order to achieve restitution.
Sasha heard that Luis was the one who stole her cellphone out of her car, so she confronted him, but he denied it. When she saw him using the phone later, she decided to sidekick him to get it back. Only after everyone started calling him a thief did he return the phone to Sasha.