a waste of space
waste of space
Someone or something that is blatantly unhelpful, worthless, or useless. Boy, what a waste of space— he's just standing around while the rest of us all move furniture. The old monitor doesn't work anymore, so at this point it's just a waste of space. Let's trash it.
a waste of spaceBRITISH, INFORMAL
If you describe someone as a waste of space, you mean that they are completely useless. The woman in charge of administration is a complete waste of space.