grotendous /gr-tnds/, adjective, grotesque, horrendous. Used for extreme emphasis. Adverb: grotendously.
Cory Doctorow brought the adverb form to my attention with a posting on Boing Boing:
What’s weird to me is how the collective output of all that great work by great people produces such lousy outcomes — DRM-crippled OSes like Vista, stupid products like the Zune, grotendously complex apps like Office,
However, he points out that the adjective grotendous is “an old SoCal word”, and was used in the 1992 science fiction novel Snow Crash by Neal Stephenson:
it is not quite so grotendous, now that the loogie is off her face, but her hand is still perfectly immobilized.
The first use of the adjective on Usenet was in 1993:
Right on! Though he may beat out Branden (and his grotendous haircut) he still doesn’t outshine Dylan
The first known use of the adverb on the web was by Psyche on GreatestJournal:
Law Classes SUCK ASS. Massively. Grotendously. So badly that I have to reate entire WORDS to describe the atrocity.