Term used to describe when a diesel engine is blowing a thick cloud of black smoke. Also common with yuppie teenager's who have there parents pay for a nice diesel truck and then put a chip in it to blow smoke.
"You should have seen that truck it was rolling coal like crazy."
by popsicleishous February 18, 2009
A large diesel truck equipped to blow large clouds of black smoke to signal a desire for deep anal fisting
I had no idea tom was into fisting until I saw him rolling coal
by Datsu smallcoch July 10, 2015