whipstall

whip·stall

 (wĭp′stôl′, hwĭp′-)
n.
A usually intentional stall in which a small aircraft enters a vertical climb, pauses, slips backward momentarily, then drops nose downward.

whipstall

(ˈwɪpˌstɔːl)
n
(Aeronautics) a stall in which an aircraft goes into a nearly vertical climb, pauses, slips backwards momentarily, and drops suddenly with its nose down

whip•stall

(ˈʰwɪpˌstɔl, ˈwɪp-)
n.
a stall during a vertical climb of an aircraft in which the nose falls forward and downward in a whiplike movement.
[1920–25]