verb (used without object), su·per·er·o·gat·ed, su·per·er·o·gat·ing.
to do more than duty requires.
Origin: 1730–40; < Late Latin superērogātus (past participle of superērogāre to pay out in addition), equivalent to super-super- + ērogātus past participle of ērogāre to pay out, equivalent to ē-e- + rog(ere) to ask + -ātus-ate1