使つかい倒たおす

godan verb (-su)

use thoroughly; use up; get the most out of

Implies using something until it is worn out, exhausted, or no longer useful; often carries a nuance of using something to its absolute limit.

• 新あたらしいスマホを買かったら、前まえのを完かん全ぜんに使つかい倒たおすつもりだ。

  Once I buy a new smartphone, I plan to use the old one until it's completely worn out.

• 彼かれは給きゅう料りょうのほとんどを使つかい倒たおして、趣しゅ味みのカメラに注つぎ込こんでいる。

  He uses up almost his entire salary, pouring it into his hobby of photography.