使つかい古ふるす

godan verb (-su), transitive verb

wear out; use up; use until worn

Transitive verb meaning to use something so much that it becomes old, worn, or no longer usable. Often implies long or heavy use.

• この靴くつはもう使つかい古ふるしたから、新あたらしいのを買かわないと。

  I've worn out these shoes, so I need to buy new ones.

• 彼かれは同おなじ言いい回まわしを使つかい古ふるしている。

  He's been using the same phrase so much it's become worn out.