herky-jerky UK /ˈhəːkiˌd͡ʒəːki/US /ˈhɚkiˌd͡ʒɚki/ adjective1 •(US, informal) Having an irregular spasmodic movement.While all that herky-jerky mathcore in your collection might not fit the bill, put some Portishead on your Pod and the attached OhMiBod will respond rhythmically in kind. — 2006 formsmore herky-jerky · most herky-jerky