出だしに使つかう

expression, godan verb (-u)

use as a pretext; use as an excuse

Used when someone exploits a situation or person as a convenient excuse or cover for their own actions. Often implies manipulation or taking advantage.

• 彼かれは会かい議ぎを出だしに使つかって、早はやく帰かえった。

  He used the meeting as an excuse to leave early.

• 彼かの女じょはいつも私わたしを出だしに使つかって、自じ分ぶんの失しっ敗ぱいをごまかす。

  She always uses me as a pretext to cover up her own mistakes.