donkey
n.— «Contrary to myth, a helicopter doesn’t necessarily fall out of the sky when the engine, affectionately known among pilots as the “donkey,” stops. The machine can glide to a survivable landing (albeit a brick-like one), much as a sycamore seed rotates to the ground, but only if the pilot makes the right moves, and quickly.» —“Get your rotors running: learn to fly a helicopter” by Tony Newton Belfast Telegraph (Ireland) June 5, 2006. (source: Double-Tongued Dictionary)
Further reading
Rose in Lebanon, Virginia recalls a phrase passed down from her great-grandmother: The night before the first day of school, parents would come into the children’s bedroom and say in a singsong voice: School butter, school butter. This...