TAO

Co-worker 1 ( on the phone): "What does t a o spell again?"

Co-worker 2 (to co-worker one):"Its tou" then laughs at coworker one in a way that implies it is completely obvious.

This is funny to me because in high school I learned it was pronounced Dào. But in fear of a pointless argument and looking like a super nerd I kept my mouth shut. Now I will just look like a super nerd online.