cap his ass 

shoot him dead

This extends the toys of the child to the toys of the adult. The cap gun kids shoot each other with is non-lethal. Guns that gangsters kill each other with are hardly toys.

I's goin' ta cap his ass for commin' into my hood (neighborhood).

cap his ass by chas November 24, 2003

popped a cap in his ass 

he shot him

English teacher "you have to use proper English when you're writing summaries in your reading log. is 'he popped a cap in his ass' proper English? no"

popped a cap in his ass by applealex December 3, 2009