The physical incarnation of a doofus's fart. Incompetent and obnoxious in every way conceivable. Originating as a portmanteau from "doofus" and "boofer", the latter which colloquially refers to a loud and bassy fart.
Breakfast was interrupted when some doofer took a dump on our front porch.
a loud, bassy, and tumultuous fart
The entire meeting came to an abrupt halt when Clarence unleashed an unexpected boofer.