high nelly noun1 •(Ireland) An old-fashioned utility bicycle, especially one with a step-through frame and high handlebars providing an erect riding posture; a roadster.I don't know what make of bike it was but it was certainly the motor bike version of the High Nelly push bike or the Tin Lizzy car. — 1974 formsHigh Nellies · high nellies · high-nellies