Same thing as a shithead or a fucking moron, either fit very well.  One who's head is filled with excrement and cannot make intelligent decisions.  A Douche, dildo or jack ass.
by Fisty McGee August 2, 2006
 Get the doody brainmug.
Get the doody brainmug.  Get the doody brainmug.
Get the doody brainmug.