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n. A wrestling hold in which the opponent's arm is pulled behind the back and twisted upward.

n. Overwhelming dominance that is difficult if not impossible to overcome: "has preserved its hammerlock on the business largely because of its reputation for quality” ( Fortune).

n. A hold, in wrestling, in which an opponent's arm is twisted up behind his back; an armlock

n. a wrestling hold in which the opponent's arm is twisted up behind his back

"Brokers don't like the fact that the combined group will have a hammerlock on Europe's futures markets—which they say makes it tougher for newcomers and raises the specter of high fees."

lock   

go-around    bonus    nerve-strain    death    reappraisal