to be utterly submissive and obedient, often out of fear or deference; to cringe and fawn.
小明平时很调皮，但只要老师一瞪眼，他立刻就伏首贴耳，不敢再捣乱了。
Xiao Ming is usually naughty, but the moment the teacher glares at him, he immediately becomes utterly submissive and dares not cause any more trouble.
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