Top definition
Doing anything at a higher speed than the recommended limit. Very similar to hauling ass, but it is more of an homage to the duo Hall & Oates, in reference to their rapid record fabrication in the 70s.

The pronunciation is derived from saying "Hall and Oates" very quickly, so you say the and as "in," as if you're saying the phrase at a higher speed.
Jack: Damn yo, you just got passed on the right by a semi!
Johnson: I know; that guy's hallin oates.
by Jefbag July 17, 2016
Happy St. Patties Day!