off the boil
off the boilBRITISH
1. If someone goes off the boil, they are less successful than they were in the past. I concede that I went slightly off the boil last season. It pays to go back to the fundamentals when your game goes off the boil.
2. If a feeling or situation goes off the boil, it becomes less strong or active. If a relationship seems to be going off the boil, it is a good idea to talk about it. Since the riots, discontent had rarely been off the boil; and demonstrations had continued throughout the decade.