loony /ˈluːni/adjective 2noun 1forms 3 adjective2 •(informal, offensive) Insane.They dismissed his loony ideas.The movie is full of loony characters. •(informal, offensive) Very silly, absurd. noun1 •(informal, offensive) An insane or very foolish person.Why, there’s hundreds of lunies of the sort to be met in London. — 1913 formsloonies · loonier · looniest
