come off

come off   从……掉下（或落下），与……分离（或分开）

【例句】

◆ The boy came off his bicycle yesterday．那个男孩昨天从自行车上跌了下来。

◆ A button had come off my coat．我的外套掉了一颗纽扣。

【联想】

come off it别胡扯，别胡说，住口：

Come off it!  We don't have a chance.别胡扯了！我们没机会。