Adjective - Awesome, Bitchin', Possessing the qualities of something that is produced in Japan for consumption in Japan (JDM - Japanese Domestic Market), these items are often percieved to be superior to american products and have a rabid following who will purchase them no matter what the price, even if there is a better domestic alternative. Often used sarcastically.
1. Dude, that right hand drive Silvia, is totally JDM Sweet, because it has a SR20DET engine, not that stupid truck motor we get here.
2.(sarc.) Those 80 dollar ground wires you got off ebay for your tercel are JDM Sweet, y0