While "lo-fi" means music recordings that are recorded raw and dirty (like in someone's basement), "no-fi" refers to recordings that are even dirtier and rawer (usually recorded in places like someone's bedroom with extra noise). Even those who like some "lo-fi" stuff will sometimes run from "no-fi" recordings, especially the extremely noisy, (often deliberately) shitty-sounding ones perpetrated by black metal, shitcore, and noise rock bands.
No-fi: early Gravy Train!!!!
Lo-fi: early Venom
No-fi: some early Darkthrone
Lo-fi: some Cutting Pink With Knives
No-fi: I Killed Techno!