This phrase was brought about in the time of debates over "Universal Health Care" and the way people behaved in the face of differing opinions.
It means to disagree vehemently, to aggressively object,
to show outrage at another opinion
and to get all up in ones face about it
That ignorant S O B !, I all most had to go all town meeting on his ass !
I'll town meeting your every word unless you start making sense !