adj. Dumbass-terous; doh-sasterous; shit-for-brains-asterous.
Real citation: "i guess someone thinks this hole underground near my building could be really 'duh'sasterous. i'm not sure what kind of authorized personnel would qualify to enter this space, or how small you have to be. i just thought the sign was kind of funny, plus i like 'danger, danger' signs."
(April 11, 2008, The Clever Whatever, http://thecleverwhatever.blogspot.com/2008/04/duh-of-week_11.html)
Made-up citation: "Until now, my life has been duh-sasterous at worst, fresh and minty at best. Looking ahead, I'm trying to establish a new ceiling of 'well-muscled yet sophisticated,' and a new worst case scenario of 'devoured by wombats,' approximately."