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A bastardization of the word "fantastic" with the word "fuck" added in for intensification.

It originated from the commonly used phrase "fucking fantastic" and was scrunched down into one word for simplicity.

Other similar words are "Infuckingcredible" and "Unfuckingbelievable"
"That show was totally fanfuckingtastic, no?"

"I had a fanfuckingtastic time today, Jane."
by Iceberg Man August 21, 2006
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Something not good, said with sarcasm.
"My car was just stolen, that's just fanfuckingtastic"
by Anonymous April 11, 2003
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Used to sarcastically describe something as fantastic. Originally from Penny Arcade.
"So how did your algebra test go? Was it hard?"
"No it was fan-fucking-tastic!"
by Blackmac October 28, 2003
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a word used to describe how awesome something is, both in a sarcastic and serious manner, depending on what the context of what your statement is.
serious version:

Ryan: Dude i just got layed!

Tim: Fanfuckingtastic bro, about time you got some ass!

Sarcastic version:

Smith: i just got your promotion Jill!

Jill: well isn't that just Fanfuckingtastic?
by Todwolf Ruziki Malachi December 21, 2012
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