Created in 2010/2011 by Jevastus Destinus, it's a joke that makes you laugh so hard that you get 6-pack abs laughing at it.
Alternatives: 6-pack abs joke, 6-p joke, six-pack abs joke, six-pack joke, s-p joke.
Jevastus: Yo, you're a real 6-pack joke, bro. I always get 6-pack abs laughing at you.
Some dude: I know that already. Thank you. :-)