also hanky panky, 1841, "trickery," British slang, possibly a variant of hoky-poky "deception, fraud," altered from hocus-pocus.
Anything dishonest, deceptive, or unethical; esp, in recent use, sexual infidelity; monkey business: She seems just to be along for some hanky-panky with her pal, General Von Griem/ can be an assurance against clandestine wrongdoing and political hanky-panky (1841+)