This word is comprised of 2 roots: tart and sexy.
It's not hard to figure out the meaning. Put 2 and 2 together and you will get 3. I mean 4.
Tart=sharp in character, spirit, or expression; cutting; caustic
Sexie=sexy=sexually interesting or exciting; radiating sexuality, glamorous, arousing sexual desire or interest, highly appealing or interesting; attractive
and so, tartsexie is the kind of sexy that will BURN you so WATCH OUT!!!!
The word originated from a game of scrabble played in San Diego by three math graduate students named Vagina, Pubes, and Labia. Pubes asked for permission to put down the word Tartsexie (sexy with an i.e.) and Vagina and Labia allowed it, because I mean, come on! If it's not a word, then it should be made into one on account that it's so awesome. Awesomely tartsexie that is ;)
"Watch out. She's not just sexy. She's Tartsexie!"
"We're just a tartsexie group of people and that's all there is to it."