Definitions

1. noun

A cover or umbrella that is not actually used to provide shelter or protection; something that is intended to provide protection but fails to do so.

“The company’s new policy was seen as an exumbrella, as it promised to help employees but ultimately failed to deliver any real benefits.”

2. noun

A person or thing that is intended to provide protection or assistance but ultimately fails to do so.

“The new employee was initially seen as an exumbrella, as she promised to help with the workload but struggled to keep up.”