supererogative

capricious changeable devil-may-care extravagant fanciful fickle fitful fluctuating free frivolous gratuitous heedless hot-and-cold immoderate inconstant intemperate lavish outrageous prodigal profuse rash reckless spendthrift spoiled supererogatory thriftless uncalled-for unfettered unreserved unrestrained up and down variable volatile wasteful whimsical wild