The new wave of comebacks, it is the exclamation at the end of any point, statement, or just plain old outburst. Most effective when accompanied by a hand movement beside the ear similar to that of pulling a slot maching handle, sound effect of cha-chink, and then finally your "register that"!
What you lookin at bitch! I'll slap you for it. (hand movement) (cha-chink) REGISTER THAT!