Green’s Dictionary of Slang

(orig. US) stupid, unintelligent.

1934		B. Appel Brain Guy (1937) 60: Betting his life on the card of a dumb ass crack.
1956		H. Gold Man Who Was Not With It (1965) 257: Well then you’re nothing but another dumb-ass mark in the crowd.
1957		H. Simmons Corner Boy 198: You’re nothing but a dumb-assed nigger!
1962		(con. WWII) J.O. Killens And Then We Heard The Thunder (1964) 29: You too educated for us dumb-ass colored soldiers.
1968		N. Heard Howard Street 176: Some dumb-assed doctors [...] tell the public that a guy can git a habit from smokin’ pot.
1970		T. Southern Blue Movie (1974) 233: How the hell is me getting fucked, on camera, by a bunch of . . . stupid . . . dumb-ass . . . nigger extras going to help my image?
1985		(con. 1968) D.A. Dye Citadel (1989) 135: Crying like a dumb-assed baby.
1988		D. Woodrell Muscle for the Wing 74: I’m going to tell you how Bell got his dumb-ass self greased.
1993		J. Mowry Six Out Seven (1994) 41: My mom wants go an treat some dumb-ass niggerboy like a guest, she gots that right.
2002		J. Ridley Conversation with the Mann 55: That [...] is how you dumb-ass niggers move a bunk.
2005		L. Redhead Rubdown [ebook] Occupational hazard when you work with dumb-arse rednecks.
1989		B. Reed ‘Messman on C.E.’s Altar’ in Passing Strange (2015) 22: ‘You’re the stupid fucking idiot fucking cunt who deliberately overturned his dumb-arsed stupid fucking truck’.
2008		A. Wheatle Dirty South 4: Making me feel as stupid as a dumb-ass ghetto brother faced with quantum physics.
2012		J.J. DeCeglie ‘Death Cannot Be Delegated’ in Crime Factory: Hard Labour [ebook] Sore about [...] her dumbarse plan goin to hell.
2015		S. King Finders Keepers (2016) 11: Don’t give me your dumbass literary criticism.
2021		T. Pluck Boy from County Hell 43: [A] dumbass Calvineau cousin who couldn’t be trusted with a cap gun.