Popular culture often has people use a specific kind of word to capitalize on a joke they've just told, or a prank they've pulled on someone.
Examples of such exclamations would include hey-oh that might follow an especially raunchy joke:
I got a powerful urge to help you out
So what's your wish? I really wanna know
You got a list that's three miles long, no doubt
Well, all you gotta do is rub like so (rubs his buttocks) HEY-O!
... bazinga, coined by the Big Bang Theory show:
You actually had it right in the first place. Once again, you've fallen for one of my classic pranks. Bazinga!
Similarly, there are more aggressive exclamations such as "Boom!", "Bam!", "Bang!" etc. that are sometimes used to double down on a hostile statement or action, and are meant to cause additional embarrassment and pain.
Is there a single word used to describe such "punch line markers".
I've already thought of "slam", "burn", "exclamation", "interjection", and "catchphrase", but they're either too generic, or don't work in all scenarios.