There is no chin behind Chuck Norris' beard. There is only another fist.

We've ignored the top 30 facts about Chuck Norris for it being essentially the same gag as that top 30 facts about Vin Diesel generator thingy from a few months back, but interesting and funnier mutations are popping up, such as this one in theSherdog Mixed Martial Arts Forums.
(Thanks to Therese )
Also: Chuck Norris burns up You Tube, including 80s cartoon drug trip Chuck Norris Karate Kommandos, The most powerful man on earth, and the likely start of it all: The Walker Texas Ranger clip gag from Conan O' Brien.
