To perform a somersault.
Starting on one's feet, an instance of rotating one's body 360 degree while airborne or on the ground, with one's feet passing over one's head.
To accelerate forwards, particularly suddenly.
To slack off a line.
To experience a momentary reversal of airflow through the compressor section due to disruption of intake airflow.
To rush, flood, or increase suddenly.
A deployment in large numbers at short notice.
The maximum amplitude of a vehicle's forward/backward oscillation.
The tapered part of a windlass barrel or a capstan, upon which the cable surges, or slips.
A sudden transient rush, flood or increase.
A momentary reversal of the airflow through the compressor section of a jet engine due to disruption of the airflow entering the engine's air intake, accompanied by loud banging noises, emission of flame, and temporary loss of thrust.
A sudden electrical spike or increase of voltage and current.
The swell or heave of the sea (FM 55-501).