There is an idiom: Too many cooks spoil the broth. True, when too many people are trying to do the same job at the same time, the result may turn out badly. Example: 'Mother, let Sam finish his project by himself. It is his homework. Too many cooks spoil the broth.' If someone asks you 'What's cooking?', they are not hungry at all. It means 'what has happened?' To cook up an excuse is to make up a story. If someone cooks up a lame excuse, their story is not trustworthy. Exercise: This magazine lacks a focus. --- --- I haven't seen you around for a long time. Answers: Too many cooks spoil the broth/ What's cooking?