From Longman Dictionary of Contemporary Englishbe glad/delighted/pleased etc to see the back of somebody/somethingbe glad/delighted/pleased etc to see the back of somebody/somethingto be happy that someone is leaving or because you no longer have to deal with something No, I’m not too upset that he left – in fact, I was glad to see the back of him. I can’t wait to see the back of this project, I can tell you  (=I will be happy when it ends). → back 
                                                    
                                                
