Normal human body temperature is 98.6 degrees Fahrenheit, or approximately 37 degrees Celsius. This temperature is exquisitely calibrated for human enzyme function, protein folding, and metabolic efficiency. A fever of just a few degrees causes profound discomfort and potential danger. Hypothermia is equally lethal in the opposite direction. The human body maintains this temperature through continuous metabolic work, and any significant deviation is a medical emergency.

Then someone multiplied that number by 2.66 and suggested it was Chuck Norris's baseline. At 98.6 degrees Celsius, water boils at 100. His body would be superheated to a point where organic molecules would denature and steam would continuously emanate from his pores. He'd be a walking furnace, instantly lethal to anything in proximity. The temperature would be incompatible with normal human function, yet the fact asserts it as his normal state.

What makes this work is the mathematical precision. It's not just saying he runs hot; it's using an actual number and applying a conversion that inverts the entire scale. The joke is layered: it's funny because it's impossible, because the number is so specific, and because it implies that Chuck Norris has achieved something that violates the basic chemistry of human existence. He doesn't just transcend normal humanity; he transcends the very thermodynamics that make life possible.