[fǔ shǒu jiù fù]   

俯    首    就    缚    低下头让人捆绑。形容无法反抗或自愿认罪。

Droop one's head and allow oneself to be bound -- to give no resistance

俯首听命    俯仰之间    俯拾地芥    俯首贴耳    俯拾即是