let down

let down  {v. phr.}

1. To allow to descend; lower.

Harry let the chain saw down on a rope and then climbed down himself.

2. To relax; stop trying so hard; take it easy.

The horse let down near the end of the race and lost.

The team let down in the fourth quarter because they were far ahead.

Compare: LET GO.

3. To fail to do as well as (someone) expected; disappoint.