(colloquial) A form of sexualextortion; the extortion of a person through the use of the history of their sexual conduct (such as saved sexting messages).
2017 May 22, Nick Hopkins, Olivia Solon, “Facebook flooded with ‘sextortion’ and ‘revenge porn’, files reveal”, in The Guardian:
Facebook had to assess nearly 54,000 potential cases of revenge pornography and “sextortion” on the site in a single month, according to a leaked document.