You probably know the word damn. Goddamn is more than just a damn. It is an extreme increase. It can be used if you
1. either hate (really hate) something
2. or live for something.
Goddamn can be written together or separately.
1. Goddamn, who eats pineapple on pizza. You must be crazy!
2. Did you see her ass, goddamn!
An Englishman. United Kingdom military member. Taken from exclamations of joy the People of France cheered during liberation as they observed the British military marching in after driving out the Germans in World War Two.
Goddamnable, as in something worthy for The God to damn.
Also can be used as an expression of happiness/anger/stress, simillar to "Goddamnit".
Example 1:"Your genes are jewish?! Goddamnable! "
Example 2:"Just drank a liter of rum, I'm so drunk that it's goddamnable!"