Frau Blucher wrote:
Nobody says fartknocker anymore
I'm pretty sure ITL
does. In fact he probably invented it.
My sister still says fartknocker, and I've never heard anyone say it but her.
As for language changing, that's just the way of things. Sometimes it changes out of trendiness, sometimes out of force, sometimes out of necessity. Sometimes the changes enrich the language and sometimes they detract from it. I think my favorite example of this is the evolution in the meaning of the word 'nice.' In Chaucer's day it meant pretty much the opposite of what it means now; 'nice' to Chaucer meant unpleasant and overbearing. It evolved from there to mean strict, austere, and orderly -- from there it came to mean clean and neat -- and from there it evolved to our current definition.
I also read once that the word 'ask' was originally pronounced 'ax'.