Massgasm
When someone from Massachusetts goes OFF about how great Boston, the pats/celtics/bruins/Sox, or their tight townie friends are in a moment of intense tension or bliss. It is often coupled with the trashing of other people's hometowns, other states, New York, or anything in general that doesn't align with MA culture.
Jake had a massgasm when describing/thinking about how "clean" the T was in comparison to the NYC subways.