" the counterexpectational ass floated beyond anatomical plausibility as far back as 1919, when someone was documented as getting angry when a “silly ass barber shaved my neck.” All manner of -ass usages pop up well before 1950: an accent criticized as having “lousy broad-ass As,” and familiar-sounding locutions such as green-ass (corporals), poor-ass (southerners), and broke-ass (a waiter). In all these cases, the point is that the quality in question draws attention. "

― John McWhorter , Words on the Move: Why English Won't—and Can't—Sit Still (Like, Literally)