卑ひ怯きょうな手てを使つかう

expression, godan verb (-u)

play a dirty trick; use underhanded methods; hit below the belt; play foul

Describes using unfair, cowardly, or sneaky tactics to gain an advantage, often in competition or conflict.

• 彼かれは卑ひ怯きょうな手てを使つかって試し合あいに勝かった。

  He won the match by using underhanded methods.

• そんな卑ひ怯きょうな手てを使つかうなんて許ゆるせない。

  I can't forgive you for playing such a dirty trick.