Supernumerary
Like, I totally can’t believe my teacher, Mrs. Rouye, the septuagenarian martinet I was telling you about, had the gall, considering the way she drones on and on, to criticize me, with no accounting for personal style, for supernumerary use of commas, when she said herself, right there on the syllabus, that these assignments were informal, and wouldn’t be marked for grammar, that she-bitch,.