sheer lunacy• And fans are in no doubt as to where bravery ends and sheer lunacy begins.• In these conditions, to encouragemassprotest over which they would have no controlappearedsheer lunacy.• It would be sheer lunacy to turn down a great offer like that.• Does he agree that such a policy - it is, of course, Labour policy - would be sheer lunacy?• It seemed an act of sheer lunacy.