He can charm the pants off anybody. [=he is very charming]他魅力四射。

She scared the pants off us [=she scared us very badly] when she phoned at 3 a.m.她凌晨3点打电话来，快把我们吓死了。

The meeting bored the pants off me.会议让我觉得无聊至极。

The home team beat the pants off the visiting team last night.昨晚主队把客队打得落花流水。