Fannytastic can be used to describe an action or person, in a situation where plain old "fantastic" doesn't have the magnitude to convey the importance.
Being Fannytastic can imply a lack of restriction within imagination, suggesting that someone who is Fannytastic has magnificent ideas that could take you to the moon!
Correct usage in a sentence: "Did you hear she’s picking up her life in France to move to Australia?"
Response: "Damn, that’s Fannytastic!."
Something extraordinarily enjoyable. that makes the one experiencing it feel all warm and gooey inside. some times exiting, sometimes its peaceful. Funtastical comes in many forms
Flowers: Brendan you were so furrytastic on the field today!
Brendan: rawrrrr thank grrrr you mooooo!!! *pets feet*
Ally: Grawllll Brendan! *stares at feet*
The saxophone section: AWHOOOOOOOOOO!