at a moment's notice


at a moment's notice

With little time to prepare; immediately and at any time. Firefighters need to be able to spring into action at a moment's notice. I can't give a speech at a moment's notice!See also: notice

at a moment's notice

 and on a moment's noticewith very little advance notice; with just a little bit of warning. They are always asking us to produce reports at a moment's notice.See also: notice