Alias · Guard Passing
Head crank
Also known as Can Opener — the canonical term used on this site.
Training background: Colloquial descriptor
Informal — cranking the head as a guard opener
Head crank is a colloquial name for the can opener — informal vocabulary for wrenching the head forward to discourage a closed guard.
Etymology. “Head crank” substitutes “head” for “neck” in casual speech; “crank” names the wrenching action. The phrase is gym shorthand, often used when the can opener is applied less as a finish and more as pressure to make the opponent open the guard.
Mechanics. Pulling the head toward the chest loads the cervical structure progressively; the spine bears mounting force as flexion increases, which is what makes the position both a threat and a tool for breaking the closed guard.
Cross-reference. “Neck crank” is a sibling alias. Full mechanical coverage on Can Opener.