What book and movie is the character Finblog from? They only say "Finblog", and all the other Finblogs know another Finblog's name but they don't say it around outsiders. In the book and movie there are humans, a cyborg and arachnid chick that travel underground through various tunnels to escape. While down there the arachnid bangs the cyborg.
This is Phillip Jose Farmer's The Dungeon, a series of six books, none of which was written by Farmer. I don't think it was a movie though.
See if this link brings back memories:
Finbogg is the character you're thinking of. There's also a giant, sentient, telepathic spider called Shriek and a cyborg, Chang Guafe.
At one point in one of the books, Shriek enters a sort of mating heat where the urge builds up in her to mate with, and kill, a male spider. Chang Guafe, being a cyborg, is the only one of the party strong enough to manually help her out and not be killed by her.