deep throatyoudaoicibaDictYouDict[deep throat 词源字典]
"A person who anonymously supplies information about covert or illegal action in the organization where they work", 1970s: the title of a pornographic film of 1972, first applied in this sense as the name (‘Deep Throat’) of an informant in the Watergate scandal.[deep throat etymology, deep throat origin, 英语词源]