lift a finger
舉手或動一動手指，表示愿意幫助或做某事
口語·批評不幫忙
英文釋義
to make an effort or take action, especially in helping or doing something
例句
He never lifts a finger to help with the housework, even when I'm exhausted.
典故來源
字面意為動動手指，表示最小的努力，常用于否定句。