擦屁股（比喻收拾残局） clear up a messy situation
Bottoms； wipe a bottom； brush the buttock
1.Liv: Your wedding can lalulalu it.
丽芙：那你的婚礼正好可以给我擦屁股。
2. We just used white paper brush the buttock, you brush the mouth with it again.
俺们刚用上白纸擦屁股，你们又用它擦嘴了
实指时，wipe sb's bottom
比喻收拾残局时，clear up a messy situation
wipe the ass
