A gross invention of the 1970's in which one would store essential items like:
hand lotion, credit cards, make up, tampons, sunglasses, band-aids, keys, moist towelettes, a watch, mini-binoculars, polaroid instant film, hard candy, a compact, and, maybe, a rattle for your baby.
The items would be stored in a pouch that attached to the hips by long interlocking straps, or, in the most horrid circumstance, Velcro.
Tiffany: "Girl, can you hold my condoms in that fanny pack until after the roller coaster?"
Sandy: "The strap on my fanny pack broke and all my heroin fell out in front of Pastor Thomas."