Personally I wish the internet would find another person to do the Bill Brasky routine on rather than some creationist, demanding prayer in school moron who did some mediocre martial arts movies.
Steven Seagal?
I first came across a Chuck Norris fact generator over a decade ago, I’d guess 2005. My coworkers and I laughed our asses off for an entire day reading Chuck Norris facts.
Humor can arise through repetition. Sometimes, things that aren’t intrinsically funny can become funny because they happen over and over, as the repetition elevates the event (a word, a phrase, an action, whatever) to absurdity. If the basic event is already funny, it may get funnier for a while.
Say, you slip in some mud and fall down. Okay, you’re probably pissed off, and your friend who sees it happen is probably first concerned about whether or not you’re hurt. Then, upon trying to get up, your foot slips and you fall back down. Then your friend, trying to help you up, also slips and falls. At some point, all the “bad” in the situation is used up–you’re never falling as far as the first time, so you’re not getting hurt worse, you’re as covered in mud as you’re going to get, and so forth. That’s when the absurdity sets in, and you and your friend end up sitting on the ground, laughing.
Different people have different repetition curves; it takes longer for things to become humorous for some people than others, and some people find things funny for more repetitions. Memetic humor takes advantage of this, combined with an enormous potential audience–once a given meme spreads enough, there will almost always be some people for whom that meme will be in the sweet spot on their repetition curve, leading them to repeat it. Even as they move on, their repetitions bring others into the absurdity, and the meme lives that much longer.
Memetic Badass memes have an edge on the repetition front because their repetition is in form, rather than specific content. The game of devising new variations on the theme delays the drop-off into boredom on the repetition curve, extending the sweet spot for many people. Consequently, these memes tend to have more staying power than non-mutating memes.
Chuck Norris put laughter in manslaughter. 
If you don’t like Chuck Norris, just switch him out for Bernie Sanders and see if the joke still works.
Bernie Sanders wears a hat to protect the sun from his head.
Under Bernie Sanders’ beard is a third fist.
Doesn’t work.
Someone’s PePes are common
Personally, I prefer O-Chul jokes. Though it’s tough to top “O-Chul was once dropped nearly-naked and tied up into a tank of acid with spikes at the bottom and an acid-breathing shark, and killed two goblins, punched out the shark, and got out”.
On a wrestling message board I post on, we tell the same sort of jokes about Sheamus.
That thread is 100+ pages long and has been going for over a year.
Like I said in the wall of text, it’s not specifically Chuck Norris jokes, it’s Memetic Badass jokes that have staying power. A show/comic/whatever that involves badassery and has a significant internet following will almost inevitably give rise to at least one.
Chuck Norris was born May 7, 1945. Germany surrendered on May 8, 1945. Coincidence?
Chuck Norris has a bear skin rug on his living room floor. The bear isn’t dead, it’s just afraid to move.
Chuck Norris once challenged Lance Armstrong to a testicle counting contest.
Chuck won by five.
I’m waiting for the OP to discover there are lists of things that might indicate that he is a redneck.
In Soviet Russia, joke discovers you
The OP might prefer the most excellent book At Swim Two Birds, by Flann O’Brien.
(Published in 1939, but reads like it was written today).
I should add that it is the account of Finn MacCool from that book which is much like an extended Chuck Norris joke.
Are you trying to make Chuck Norris movies look good?
Chuck Norris lives in fear of the day that Obama leaves office and is free to kick his ass.
Chuck Norris’s tears can cure all known disease…but he never cries. Ever.
You can’t simply walk into Mordor. You are not Chuck Norris.