To prostitute oneself, to be unfaithful (men or women), to have promiscuous sex (with or without payment).
Некоторые дети [в Георгии] от отца воровать, а от матери блядовать научаются.
Some children [in Georgia] learn to steal from their father and whore from their mother.
(Гюбнер И., Земноводного круга краткое описание из старыя и новыя географии, 1719
Russian translation of Kurtze Fragen aus der alten und neuen Geographie by Johann Hübner, 1693)