It's likely a misspelling of "expendable", which means:
* Easily replaced or sacrificed: Something that can be lost or destroyed without causing significant loss or damage.
* Not essential or valuable: Something that is not important or necessary, and can be discarded or used up.
Examples:
* "The soldiers were expendable in the eyes of their commanders."
* "This old computer is expendable; we can replace it with a newer model."
If you were trying to use "dispendable" to mean something else, please provide more context so I can understand what you were trying to say.