Collective name for anonymous artists on Western imageboards, such as those found in 4chan's long combo of threads since summer 2010.
In the context of AIBooru, this usually does not refer to the fact that the work is drawn, but instead originates from somebody who posted their AI generation on a Western imageboard.

Catalogs:

Hentai Diffusion: https://boards.4chan.org/h/catalog#s=hdg
Ecchi Diffusion: https://boards.4chan.orge/catalog#s=edg
VTuber: https://boards.4chan.org/vt/catalog#s=vtai
Alternative Diffusion: https://boards.4chan.org/d/catalog#s=ddg

Known drawfag artists:

brittle
firedotinc
irasutomania
umbrellafucker_(drawfag)
aiusotsuki