fat washing
n.— «Although in this case it’s bacon-flavored bourbon, and the process, known as a fat washing, is different from a typical infusion. Essentially, beverage director Paul Westerkamp renders bacon, combines the grease with Woodford Reserve bourbon, freezes it, pokes a hole in the upper frozen layer, and then drains and filters the liquid.» —“Bringing home the bacon” by Luke O’Neil Boston Globe (Massachusetts) Sept. 13, 2008. (source: Double-Tongued Dictionary)