1) I know kung fu!!!
2) Yeah? Well I know "Ching Ching Pow"!
1) What the fuck?
2) Yeah bitch, (with hand motioning) "Ching" (pulling slide back) "Ching" (slide going forward with round) "POW!!!" (gun firing)
Money. Comes from the sound of a cash register, especially when full of coins, when it opens. Often used at the end of a sentence with an exclamation mark.