1.Professional cant; the chatter of conjurers to divert attention from their tricks; hence, jugglery. (Colloq.)
2.Illegal or unethical behavior, usually surreptitious; as, the boss got suspicious when profits seemed lower than expected, and hired an investigator to see if any hankey-pankey was going on. (Informal)
3.Extramarital sexual relations, especially adultery. (Colloq.)