I stole a joke and I made the most of the laughter that it received.
I'm curious as to why you would steal the joke in the first place.
I like the way it was made, I like the way it comes off. I like how it works for me, and how everyone was laughing at the joke.
Stealing jokes might not seem like a big deal, but it's still stealing. You should admit you're wrong and hope that people will respect your honesty. Otherwise you could be consumed with guilt.
What if I can't bring myself to be honest?
You need to give credit to the person who wrote the joke and you should tell who you can. Additionally, this isn't something you should do again as stealing the ideas of others is morally wrong.