I haven't heard that term before. But from what you describe it sounds the same thing as I learned as "steady to wing and shot" in a quail dog.
Once pup is excited about retrieving you must always make him wait until you give the command to retrieve. It sounds like yours is ready. You pick the command( the dog don't speak English so it don't matter ) "dead bird", "fetch", I use " git it dog", you get the picture. Whoa the dog then restrain him. Throw/release the dummy/ball/dead bird, make the dog wait until it gets figity. Give the command "git it dog" then turn him loose. Man alive what fun for both of you.
The key is if the dog is excited about retrieving he is half way home. You just have to teach him that you don't get it until I say go.