unfuckingbelievable

American  

[uhn-fuhk-ing-bi-lee-vuh-buhl, -in-] / ˈʌnˌfʌk ɪŋ bɪˈli və bəl, -ɪn- /

Also unfuckinbelievable

adjective

1. so remarkable as to strain credulity; outrageous.

   I would say his excuses are unfuckingbelievable, but I’m not even remotely surprised.

2. extraordinarily good or shockingly bad: The nerve of this guy—he’s unfuckingbelievable.

   The tacos are so delicious and the salsas are unfuckingbelievble.

   The nerve of this guy—he’s unfuckingbelievable.

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Etymology

Origin of unfuckingbelievable

First recorded in 1995–2000; by tmesis, i.e., the interpolation of a word, here fucking, between the parts of another word, here un-believable