My car gets 12 rods to the hogshead and that's the way I likes it.

**Hobo Power** - Radio personality Adam Carolla came up with this one: a measure of how bad something smells. It ranges from 0 (not stinky at all) to 100 (lethal). A "robust fart" is about 13 hobo. At 50 hobo, the person doing the smelling would projectile vomit.

**jerk** - Ever feel a jerk of the car when you accelerate fast? Well, engineers define a jerk as a unit of the rate of change of acceleration. 1 jerk is equal to 0.3048 m/sec^{3}.

**jiffy** - there are two definitions of a jiffy, both of which are units of time and mean very, very fast. In computer engineering, a jiffy is one cycle or one tick of the computer's system clock. It is 0.01 second. The second definition is the time required for light to travel one centimeter, as proposed by American chemisty Gilbert Lewis. This translates to 33.3564 picoseconds.

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