Used to express strong emotions, normally when someone is unexpectedly upset or angry.

Emotional Intensity

It's a casual expression, so it’s not suitable for formal contexts like business meetings or academic reports.

Informal Phrase

Particularly used in the UK, might not be well understood by English speakers from other regions.

Describes items not being used; often implies they're being wasted or overlooked.

Refers to physical items, usually ones that could be of use but are set aside.

The expression doesn't apply to services or non-tangible items, usually just physical things.