Glossary /// Alias
Reverse armbar defence
Also known as Inverted Armbar Escape — the canonical term used on this site.
Descriptive — rotation opposite to the standard armbar
Reverse armbar defence names the inverted armbar by its rotational direction, which runs opposite to the standard armbar and catches defenders whose reflexes were built on the conventional version.
Etymology. “Reverse” is doing real work here rather than acting as a loose intensifier: the two attacks load the elbow through opposite rotations, so a defensive habit tuned to one is actively wrong against the other.
Mechanics. The defender’s instinct — rotate the thumb up, as against a standard armbar — deepens this lock. The correct answer is pronation, thumb down, which kills the supination angle the press works through. Late, the bridge unweights the control long enough to spin the arm free and rebuild half guard.
Cross-reference. “Violin armbar escape” is the colloquial name. Full escape coverage on Inverted Armbar Escape.