-fucking-

• fucking (when the original word has a space)

From fucking, from fuck.

-fucking-

1. (vulgar) An intensifier.

   Synonyms: -bloody-, -goddamn-

   Holy shit! That's unbefuckinglievable!

   • 2000, Guy Ritchie, Snatch (motion picture), spoken by Brick Top (Alan Ford):

     Well, where'd you lose him? He ain't a set of fucking car keys, is he? And it ain't as if he's incon-fucking-spicuous now, is it?

• It is generally inserted before the stressed syllable, but may also be inserted between the prefix and the base.

  absofuckinglutely

  unbefuckinglievable

  unfuckingbelievable

• This is an example of tmesis.
• When placed between words in a phrase or name, this infix is usually written with spaces.

  Jesus Fucking Christ!

  New Fucking York

• Variations such as -hecking- (from heck) tend to be used when intentionally avoiding vulgar words.