1) A nick name given to those who find the insertion of small rodents into the lower colon via the anal sphincter to be sexually stimulating.(see Richard Gere)
2) A person who can not throw away anything that, in their mind has value of any kind, and so begin meticulously filing away, in the style of the pack rat found in nature.
3) A species of rodent
1) Richard Gere was reported to have had a gerbil inserted up his ass, making him a different kind of pack rat.
2)Everyone knows a person who can't throw junk away, they're pack rats.
a 3d artist, usually a novice, that feels the need to store excess polygons within a 3d model, for no good reason other than the fact that it's possible.
Did you see Ryan's model? he showed it to me and I just started pulling at the verts, and sure enough there was like 20 polygons in there! What a Pack Rat Modeler.