The combination of "fantastic", "fabulous", and "ballsy." If someone describes you as fantabuballs, you are truly amazing in all from and sense.
Joe: Man, you look fantabuballs today!
Tim: Thanks dude! It's going to be a fantabuballs day, gotta dress for the occasion!
Tim: Thanks dude! It's going to be a fantabuballs day, gotta dress for the occasion!
by Patron Saint of Lost Causes August 20, 2013
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Alex: Man I feel awesome!!!!
Mason: Wait your not feeling fantasquballstic are you?
Alex: Well actually I do feel like i just swallowed a bottle of coke and pop rocks...
Mason: OH SHIT HIT THE DECK!!!!
Alex: *BOOOOOOOSSSHHHHH*
Mason: Wait your not feeling fantasquballstic are you?
Alex: Well actually I do feel like i just swallowed a bottle of coke and pop rocks...
Mason: OH SHIT HIT THE DECK!!!!
Alex: *BOOOOOOOSSSHHHHH*
by theonly1left December 23, 2009
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