Source of Pride for Diesel Enthusiasts Draws Ire of EnvironmentalistsOver the past week, the topic of "rolling coal" has caught on across the Interwebs. The term needs no explanation among the diesel enthusiast community, who know the term means putting a good puff of black smoke into the air as a way of asserting your truck's dominance over your rivals -- or as a figurative middle finger to nagging environmentalists that like to wag their fingers at anyone not driving a Prius or Leaf.

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Photo Gallery: Rolling Coal: Modern-Day Rebellion

Photo Gallery: Rolling Coal: Modern-Day Rebellion



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The first time my truck 'rolled coal' I'd be at the CAT shop getting it repaired…