To Tapail, or Tapailing, is to bring harm to another person to gain favour from people you aim to impress and to activly get them to cause harm to the person belittled. This can take the form of many things such as lieing about what someone has done to you for attention, or to bullying someone to gain respect.
He told everyone I stole from him so they would support him, I was really tapailed
He was really tapailing the new kid
That person is a real tapail