To shrug one's shoulders and stand on tiptoe, depicting a fearful, timid, or obsequious demeanor.
小明被老师叫到办公室，他胁肩絫足地走了进去，生怕自己犯了什么错误。
Xiao Ming was called to the teacher's office. He walked in, shrugging his shoulders and tiptoeing, afraid he had made a mistake.
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