niminy-piminy noun 2adjective 1forms 2 noun2 •excessive primness; affected delicacy; mincingness •one who acts in an excessively prim manner"I was," she said, "but I didn’t stay." Her nose was shiny and her hair was bedraggled. "If I had been penned in with that niminy-piminy any longer I'd have broken down the door to get out." — 1976 adjective1 •Overtly or excessively prim."I detest rude, unlady-like girls." "I hate affected, niminy piminy chits." — 1868 formsmore niminy-piminy · most niminy-piminy