pull all the stops out
To do something with maximum effort or ability; to use all or the best available resources when doing something. The company pulled all the stops out for the CEO's retirement party. The senator is going to have to pull all the stops out if he's to have any chance of winning this election. What a fabulous party, Mary—you really pulled all the stops out!
pull all the stops out
Fig. to use everything available; to not hold back. (Alludes to pulling out all of the stops on an organ so that it will sound as loud as possible.) The mayor decided to pull out all the stops and campaign in every district. Todd pulled all the stops out for his exhibition and impressed everyone with his painting artistry.