a pack rat

a pack rat

  (American)
someone who collects things that they do not need For me there could be nothing worse than living with a pack rat.
See also: pack, rat
References in periodicals archive ?
For a person, life as a pack rat is one of obsessively collecting, say, newspapers, computer parts, food containers, or maybe all of these.
A friend of mine lost his glasses to a pack rat," says Kenneth Cole of the U.
There's a pack rat with three vacant, junk-filled houses over on upscale Greenbush Avenue in Sherman Oaks, where you can't touch a home these days for under a half-million bucks.
Piles of debris around a cactus, bush, or tree are signs that a pack rat is in residence.
If you have a tendency to be a pack rat, you might have a habit of holding on to things "just in case.