Top Definition
The act of adding up individual horsepower gains from bolting on crappy JDM parts to your Honda
Hey dude, my Honda Civic is really fast now. I got an additional 6 horsepower, 3 from that JDM intake tube and 3 more from the JDM air filter.

Man, nice JDM math, but you car still sucks.
by DB from MO July 26, 2008

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