When something is incredibly unbelievable.
It is the ugly cousin of the word unbelievable. Typically used when a person is angry or in shock.
John: "What are you saying, she not only ate the 18 ounce steak, but the 3 baked potatoes as well?"
Jess: "Yeah, it was unfuckingbelieveable!"
by mistressJessFantastic January 11, 2009
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so unbelievable you have to add fucking for extra umph!
.. my FAVORITE word ..
UnFUCKINGbelievable! I would have never thought that drinking 18 beers could make anyone so hott!
by Errn April 9, 2003
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When something is so hard to imagine, that you just can't fucking believe it.
Did you see that jerkoff pull out in front of my car and almost hit me?!
That was just unfuckingbelievable!!!
by Sandra April 14, 2005
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Dave:This is Unfuckingbelievable

Jerry:I'm sorry it's not my fault I'm going 8-0 in leauge

Dave:Kill yourself
by Original Jerry June 27, 2018
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