adj. Done by a doofus, or with a doofus, or to a doofus, or in the name of a doofus, or in lieu of a doofus, or just with a doofus-like flair.
Real citation: "OK, now you are just being wilfully doofusistic."
(Gzuckier, March 18, 2005, http://en.wikipedia.org/wiki/Talk:Ann_Coulter/Archive_2)
Made-up citation: "According to the cosmic tea leaves, Aries, a sadistic sailor and a doofusistic doctor will appear Monday morning in the basement of a loved one."