Office of Management and Budget, theˌOffice of ˌManagement and ˈBudget, the (abbreviation OMB) 
a US government organization that provides help for the president in organizing the work of government departments and especially in preparing the budget (=the official plan for how government money will be used)
a US government organization that provides help for the president in organizing the work of government departments and especially in preparing the budget (=the official plan for how government money will be used)