the tail wagging the dog
idiomPart oftail
the tail wagging the dog — idiom
1. a situation in which a small or unimportant part of something controls or domina
1.idiom
Definition
a situation in which a small or unimportant part of something controls or dominates the larger or more important part
Example
Letting one intern decide the schedule is like the tail wagging the dog around here.
Critics argued that the committee was the tail wagging the dog, overriding the full board.