An intensifier; much like the word 'fucking'. Much more intense when used in proper context. However, unlike fucking, it cannot be used as a synonym for the act of fornication.
logically-impossible gerundive (verbaladjective) made from a noun cunt which makes a damn' good word
"Which one of you cunting fuckers said there were weapons of mass destruction in that one-horse fucking country?" - Tony Blair, Colin Powell, Jack Straw, et al., all looking at Donald Rumsfeld (George Bush was having difficulty counting the number of colours on the US flag at the time).
"Get that cunting iceberg out the fucking way!" - attributed to the Captain of the Titanic