Amoeboid-shaped extra-planar demon one can summon for grotesque sexual gratification. Inspiration for many, many manga flicks, though the entity certainly should not be confused with a titillating cartoon character, however horrific.
Ex: "Umm, you need an Elder Sign to summon a shoggoth, but even with one, you will probably be killed before you can mold a protoplasmic pussy. Better stick with your sister, she doesn't know any better after the accident anyway," confided Cletus.
by Anonymous February 25, 2003
Get the shoggothmug. 
Modifying a computer to make it look cool. Generally followed by the realization that computers don't make you cool. Plastic windows so you can see your electronics, neon lights, and loud fans.
by Anonymous October 29, 2003
Get the case modmug. 