What does it mean?
– When too many people work together on a project, the result is inferior.Dictionary.com).(source:
– used for saying that something may be done badly if too many people try to do it together. (source: Macmillan Dictionary).
There were so many people working on the same project, no one knew what anyone else was doing. I think it was a case of too many cooks.(source: The Free Dictionary).
“That project failed miserably, there were five people in charge of it and no one could come to an agreement, just too many cooks in the kitchen” (source: Urban Dictionary).