腰こしが引ひける

expression, ichidan verb

get cold feet; back away; withdraw

Describes losing nerve or becoming hesitant, often in a situation requiring courage or commitment. Literally 'one's hips pull back', evoking a physical retreat from a challenge.

• いざ本ほん番ばんになると腰こしが引ひけてしまった。

  When it came time for the actual performance, I got cold feet.

• 彼かれは責せき任にんを取とることに腰こしが引ひけているようだ。

  He seems to be backing away from taking responsibility.