A word used to describe when you've had a fantastic, fabulous, fantastic day. This word falls under the category of closed compound
words, and is typically used when you are too
lazy to move your mouth around when you could do it with -
3 times the effort.
White
Chick: OMG. I just went to
Starbucks and I had the most fantabulastic time!
White
Chick 2: LOL. Really? What was it that made your time there so fantabulastic?
White Chick: OMG. I CAN'T EVEN. They just released the new Pumpkin Spice Latte! Totes my fave.