(verb) A very genteel southern term for urination. Used for both sexes in childhood, used by women throughout their lives. Tee tee comes from the tee-hiny. A person who would use this term would never let the coarsely vulgar "pee" ever cross their lips.
"I have to tee tee so bad - I hope that fat lady in the left stall and the woman with three little children in the right one will hurry up," said Velva Mae to her sister Venery Ann.