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.
Something slightly more amazing than fantastic, but much more astounding than fantabulisticesqueastic! Basically, it's a cool way of saying that something is the greatest thing ever.
Greater than Fantastic...Greater than Fabulous....Greater than Terrific...Greater than Delicious....Far, Far, Far beyond your wildest imagination of things that are WONDERFUL and bring you the up most feeling of joy and love and acceptance and fulfillment . This word describes the very thing that most people (sadly enough) will never get to experience in their lifetime.
I had the most FANTABULISTIODELICIOUSTIC night imaginable.
The only way to describe our honeymoon was FANTABULISTIODELICIOUSTIC.
He told me that I was FANTABULISTIODELICIOUSTIC!!!