look up any word, like bukkake:
 
1.
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
 
2.
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 08, 2003
 
3.
When someone or something sounds so farfetched that it is beyond belief.
"Did you bang that chick?"
"yeah, It was un-fucking-believable!"
by Ben Jammin February 10, 2005
 
4.
1) exclamation regarding something that should not have been possible to do.
2) exclamation concerning or referring to something which is impossibly astounding and/or astoundingly impossible.
Did you see the size of that guys smegma? Un-Fucking-Believable.
by Opus May 04, 2003
 
5.
1. A term to describe something purely awesome and UN-FUCKING-BELIEVABLE!
2. Christopher Walken's hilarious line from the PC game by Take-Two, Ripper.
This guy, is UN-FUCKING-BELIEVABLE!
by Jewfro man December 10, 2009
 
6.
Something so unbelievable it's incomprehensible or something that is hard to believe.
Being abducted by aliens is so Unfucking Believable.
by Nichole McKnight September 26, 2009
 
7.
The only thing in the english language that one can "un" fuck.
Don't tell me I did that ugly cunt last night. Unfuckingbelievable.
by rdc September 26, 2003