Apparently, people from Connecticut call hot boxing clambaking. In the words of a certain CT resident “its smoking pot in your car, rolling the windows up...like a clambake.” It combines the wonders of first hand and second hand smoke to maximize THC intake.

smoking weed in small, enclosed areas, such as a car. It's called clambaking because when you're done smoking and you open the windows, all the smoke pours out, just like clambaking