The word "wedidit" is an exclamation that expresses excitement and joy. In the context of the clue "Yippee for us!" [4th of 7], it suggests that a group or collective effort has achieved success. It can be seen as a celebration of accomplishing something together.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: "Yippee for us!" [4th of 7]. Explanations are generated by AI and may be inaccurate.