Someone with an IQ low enough that you have to dig for it, not just test it.An example of a dumb fuck is George W. Bush.If you find this offencive, thenjust ignore this whole entry,especially the example.
American1:George W. Bush is such a dumb fuck!
American2:Hey,isn't that his bomber right above your house?
American1:First he sends us to war, now he's bombing us!
American2:Maybe you shouldn't have called him a dumb fuck
American1:Hey, isn't that your house he's bombing, now that he's done with my house?