Every time I hear the word "irregardless" being used, I cringe and fight the urge to whip out the Oxford dictionary and break their little hearts that the word doesn't exist.
It is not a real word, and despite the attempt to sound smart, you are failing. People (like me) are too embarrassed to correct you in public.
I encourage and applaud the use of made up language for comedic purposes, for e.g. ugly/ridunculous/fabulosity. It's just the use of such words as if they are proper in professional situations that kills me.
Anyhoo is there a fake/made up word that irks you?