The action of lunging your head forward at an annoying individual, while holding your shoulders back. The neck check is meant to make the annoying individual flinch, hence showing the world that he/she is a pansy.

In many cultures, neck checking someone will lead to bloodshed.
Frank: You know what Jim? You are such a pu$$y

Jim neck check's Frank

Frank flinches like a little bitch
by antizzle November 28, 2012
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A phrase used to signify that a person is doing well and accomplishing a lot in his or her life.
Larry: "Hey Jeff how have you been after graduating high school?"

Jeff: "Im breakin' necks and cashin' checks man, I just got a full ride scholarship to college."
by Jonan2012 January 18, 2011
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Using your hand to hit someone, usually a close friend, in the throat after they've thoroughly exhausted your patience. Most often used when someone won't shut up about a particular celebrity, person or event.
Friend 1 proceeds to rant about the tickets he just scored for the upcoming concert. Friend 2 karate checks him in the neck.
Friend 1: Gasping for air*
Friend 2: I'm neck checking you for your own good, bro, your own good.
by Miya Arachelli October 23, 2013
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