gather dust
To be unused or forgotten, especially for a long period of time. My writing skills have been gathering dust ever since I got this job in the IT department. My grandfather still insists on writing letters by hand, while the laptop I got him gathers dust in the corner of the kitchen.
gather dust
Fig. [for something] to sit unused for a long time. Most of my talent is just gathering dust because I don't really have an opportunity to perform.
gather dust
COMMON If something gathers dust, it is not used or dealt with for a very long time. The report has been gathering dust on a shelf. She swam in the pool every morning and used the treadmill that had been gathering dust.
gather (or collect) dust
remain unused.gather ˈdust
(of plans, recommendations, etc.) be forgotten or ignored: As usual the report was left to gather dust and not dealt with by the authorities for years.