SMH is an acronym meaning "shaking my head." It is an expression of un-verbalized contempt, used by
people highly contemptuous of the
world but too stupid to be able to express their disgust in actual words. It is, essentially, the grunt of the
ignorant cynic.
Person 1, not a libertarian: Libertarianism is the political philosophy of toddlers. It is the ultimate outcome of a mindset centered completely on one's self, and
ignorant of the existence of other
humans.
Persion 2, libertarian: Dude, you just
don't get it. SMH.