Um-Shmum (Hebrew: או"ם שמום Hebrew pronunciation: [ˈ(ʔ)um ˈʃmum], where um is the Hebrew acronymic pronunciation for "U.N.",[1] and the "shm"-prefix signifies dismissal, contempt or irony) is a phrase coined by the Israeli Minister of Defense (and former Prime Minister) David Ben-Gurion on March 29, 1955 during a cabinet debate regarding his plan to take the Gaza Strip from Egypt in response to the increasing fedayeen terror attacks on Israel.
The expression has become part of Hebrew street dialect.[2]