Throwaway (adjective)

1. Designed to be used only once and then discarded.
2. Not worth keeping or preserving.
3. Not meant to be taken seriously or given much consideration.

Origin:

From the verb throw away, meaning to discard or get rid of something.

Examples:

1. The company produces throwaway razors that are not meant to be reused.
2. The movie was a throwaway horror film that was quickly forgotten.
3. It was a throwaway comment, not meant to be taken seriously.
4. The throwaway society we live in generates a lot of waste.
5. The throwaway culture of fast fashion is unsustainable and environmentally damaging.