RetroGrouch is a poster on this forum thats all I know. I never heard of the word out side of that.

I would guess that it would mean something to the effect of as a computing example, " I use vi damn it because it is the best text editor ever made. You don't need that stinking wisywig crap bah bah".

Or perhaps, "Downtube shifters were the last necessary piece of shifting equipment ever made. And only the friction ones. STI is a waste of money and is no where near as reliable damn it"

You know they like the old stuff and the defend it in a grouchy way? I dont know?