let the side down
idiomPart ofside
let the side down — idiom
1. to disappoint or fail to help the members of your group, team, or family by not
1.idiom
Definition
to disappoint or fail to help the members of your group, team, or family by not doing what was expected
Example
Gabriel felt he had let the side down by arriving late to the team presentation.
The goalkeeper let the side down by missing an easy save in the final minute.