Alias · Guard Passing
Half butterfly hook kill
Also known as Half Butterfly Pass — the canonical term used on this site.
Training background: emphasises the hook neutralisation
Descriptive — killing the single half-butterfly hook
Half butterfly hook kill is a descriptive name for the half butterfly pass — naming the neutralisation of the single butterfly hook present in half-butterfly guard.
Etymology. “Half butterfly” names the hybrid position, one butterfly hook plus a half-guard leg; “hook kill” names the decisive action. The phrase is mechanical description, foregrounding the hook over the pass itself.
Mechanics. The lone butterfly hook is the position’s foot-line engagement; killing it removes the hook’s claim on the passer’s leg, so the guard can no longer use that hook to elevate or off-balance, and the half-guard remainder collapses into a standard pass.
Cross-reference. “Hybrid half guard pass” is a sibling alias. Full mechanical coverage on Half Butterfly Pass.