In Somerville, a lesbian cafe

For students in the Back Bay area, "Diesel" is more of an adjective for someone who works out a lot, rather than a noun.

In Charlestown, which was always known for the Angel Dust, we call Diesel, Diesel Fuel, Rocket Fuel

In Rockland (and possibly wherever else), diesel pretty much means the same thing as pissa:"My probation ends next Tuesday""That's fackin' diesel kid!"

I agree with Dayna that diesel is more used as an adjective to describe a very buff person. and Josh that it is a word to positively accentuate something. Also of note, it's sometimes used to describe the potency of weed. "That was a muthafucking diesel hit man"Also, Sour Diesel is a specific kind of weed, more from Woony and surrounding area, but also found around Boston.

"For students in the Back Bay area, "Diesel" is more of an adjective for someone who works out a lot, rather than a noun."I happen to be a student in the Back Bay area, and we say something like "diesed" like "that guy is wicked diesed" meaning he's got a lot of muscles, more than saying someone is a diesel

It was diesel in Somerville as well, and further nicknamed "swizzle."