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An action; as in travel safe or keep your vehicle on its tires. Keep the underside of your vehicle to the ground...keep the greasy side down! The undercarriage of older vehicles especially, could be found unusually greasy and full of oil. In instances where there may be an oil leak on your vehicle or the exhaust was excreting oil.
You're heading out on your road trip to Yellowstone Park? Well then, keep the greasy side down!
by AB in MT February 18, 2010
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