douche

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Unless a doctor tells you to, you should not douche.
除非医生吩咐你，你自己不要这样做。
In his responses, Joe bragged about his massive wealth while insinuating that Kevin as a fat, insecure douche bag and overall failure.
作为回复，乔开始向凯文炫富，并嘲讽凯文是个一事无成的死肥仔。

The douche maker has pulled the spots all from YouTube, but you can watch them here.
FORBES: Nivea Makes Us Ask Again: Why Is It So Hard to Make Non-Racist Ads?
Where is the anger at the douche-bags that provided the mortgage even though statistics were telling them it was dead from day one.
FORBES: Meet The New Subprime: It Will Cost Us Billions
They packed themselves with sponges, made certain they had enough douche, checked cabinets for the little black pills that, along with three days of hot baths, usually "brought a girl around" from any unwanted condition.
NPR: Elevating the World's Oldest Profession in Chicago

to put a liquid, usually water, into the vagina in order to wash it or treat it medically

A douche is a method of washing the vagina using a stream of water. You also refer to the object which you use to wash the vagina in this way as a douche.
To douche means to wash the vagina using a stream of water.