To strike your partner in the face/head with your penis
Len threatened to bite Mark’s penis during a blowjob, so Mark pistol whipped Len and left a mushroom shaped bruise on Len’s forehead.
Being ghosted and forgotten by your dream girl after investing any of the following into her or your "cause";
1) hours equivalent to a paying job
2) two or more paychecks
Or
3) more energy then most believe she is worth
Did you hear about Jason? That bitch Krystol Pistol Whipped him 2 days after he bought her that car.