tabbing
n.— «All of sudden a helicopter rises out of a valley, makes one pass over the landing site, before zeroing in and touching down.…They are returning after a night under the stars, tabbing, as they call it, around a dozen miles over testing ground.» —“Right out of the Kenyan blue” by Matt Wescott Northern Echo (Darlington, England, United Kingdom) Dec. 26, 2008. (source: Double-Tongued Dictionary)