History of the term 'spispopd', as far as I can reconstruct:
A long time ago, people were waiting for a game called DOOM to arrive. It was much anticipated, and the newsgroup comp.sys.ibm.pc.games.action was flooded with posts about it, irritating a lot of other people. This led to the following post by 15-year old Eli Bingham:
(Copied from the groups.google.com archive)
Newsgroups: comp.sys.ibm.pc.games.action
Subject: Solution to all the DOOM posts...
From: ebingha@eis.calstate.edu (Eli S Bingham)
Date: 30 Nov 1993 11:06:20 -0800
Listen up, ID Software!
Next time you have an impending release of a much anticipated game, make
sure it's name is not so cool-sounding as DOOM and much longer to
eliminate all of the casual "Where can I get xxx" posts. How about
"Smashing Pumpkins Into Small Piles Of Putrid Debris" for the next game?
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* Eli Bingham ebingha@ctp.org bingha2@hotsun.nersc.gov *
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* "I am not a number, I am a free man!" - The Prisoner *
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Immediately, Usenet did what it does best, and huge threads about the upcoming game SPISPOPD were started. There was big speculation about the game's features, the people who were irritated by all the DOOM posts were much annoyed by all the SPISPOPD posts, and soon enough someone wrote the SPISPOPD FAQ, a parody on the existing DOOM FAQ.
Then, someone at Id Software noticed all of this, and put the cheat code idspispopd into the game; this turned clipping off, and allowed players to walk through walls. In DOOM II, this was changed to the more mundane idclip.
Then, Hamumu Software created the game Amazin' Spispopd. In the game (which features pumpkins), you can collect power-ups that allow you to walk through walls. You can get it at http://hamumu.com/game_amazin.html (for about $11). And so the circle was closed.
A game can't be the best game ever without this kind of trivia surrounding it...