Verb
tar out (third-person singular simple present tars out, present participle tarring out, simple past and past participle tarred out)
(transitive, slang, dated) To punish; to pay back or take revenge on.
Being gentle means forgiving yourself when you mess up. We should learn from our mistakes, but we shouldn't beat the tar out of ourselves over them. The past is just that, past. Learn what went wrong and why. Make amends if you need to. Then drop it and move on. Sean Covey