A phrase used to signify that someone is taking charge and getting shit done! The term is well known for being used in the movie Step Brothers!
James Bond: "FunDawn, did you put laughing gas in the HVAC system?"
FunDawn: "Heck yeah, I am snappin necks and cashin checks, kitties!"
or
Boss: We are snappin necks and cashin checks today kitties!
Crew: Shit yeah Boss, killin it today!
Strengthening and conditioning exercises focusing on the neck and trapezoids. Often advertised on late-night TV by people who want to be Chuck Norris. Incidentally, it is rumored that Chuck Norris has no need for necksercise.
The ninjas attacked out of nowhere. Jimmy sprung into action, instinctively attacking the warriors with his muscle-bound neck. "Don't thank me," he told the supermodels as the ninjas lay defeated. "Thank necksercise."