noun. He/she is talking, but there is no brain! Someone replaced the delicious membranes with delicious apple sauce.
Real citation: "Or is she the spokes-dumbass for the horrifyingly ignorant? As her ridiculous positions and her trollish behavior both qualify."
(Sept. 19, 2008, We Beg to Differ, http://www.webegtodiffer.com/showthread.php?t=45767&page=5)
Made-up citation: "I think I would be a terrific spokes-dumbass, 'cause I talk real good. I'd also make a fine Pope. Ever since I was a little girl, I've always felt a little papal, even when organ harvesting."