Verb:

When a man kneels between a woman's open legs, makes a pistol shape with both hands, and proceeds to rapidly jackhammer her pussy with the tightly clasped hands. Once mastered, a true pistoler will reap rewards by stimulating the clitoris with the repetitive and frantic 'cocking' of the pistol with his powerful thumbs.

Note: The pistol can be single, double, triple or even quadruple-barreled depending on the level of pussy gapage.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.

A person's ability to consistently kill with a Handgun.
Someone's skill with a handgun.
Using a handgun in battle.