Sir or Madam (German: Ossi hat die Hosen an) is a 1928 British-German silent comedy film directed by Carl Boese and starring , Percy Marmont and Ossi Oswalda. It was based on the 1923 novel by Berta Ruck and shot at Elstree Studios near London. The film was a co-production between Germany and Britain, with separate versions released in the countries. In Britain it was not released until February 1930.