This is peak chemistry wordplay! The person asks if eating 1kg of nachos would make them 1% nacho (by weight), but the brilliant response points out that humans are already made of Sodium (Na), Carbon (C), Hydrogen (H), and Oxygen (O) - which spells NaCHO! So technically, we're all 100% nacho already! It's elemental humor that would make Mendeleev snort his periodic table in delight. Who needs identity crises when you can have delicious chemical composition revelations?