Here's a quick rundown... others can fill in details I missed or correct where I goofed:
Chase card - as opposed to a "common" or "base" card, a chase card is one that appears less frequently in packs, and therefore is something to be "chased." The odds of finding them can be nutty. Examples in the Wacky world include variant cards with different color borders, and sketch cards. (Not to be confused with a chaste card, which I recommend abstaining from.)
Gravity feed box - a box usually meant to hang on a peg in a retail store (though they can also sit on shelves and counters). It contains a larger number of packs than most boxes and has an opening at the bottom that displays a stack of them. As buyers pull packs from the bottom to search for chase cards purchase, more packs "feed" down to the bottom thanks to the force of gravity.
Booster box - this term is from the gaming card world and doesn't apply so much to Wackys, though it is sometimes (ab)used by sellers to refer to bonus boxes. A trading card gamer would buy a booster box to help build his playing deck, and the booster box often contains cards that can't be found in the regular series box. Bonus boxes may be exclusive to a card distributor and may contain a special card that is available in no other package. (It is a misconception that these bonus boxes are exclusive to particular stores.)
Hobby box - a box meant to be sold in specialty stores like card stores and comics shops, as opposed to retail boxes that one would find in Target, Wal-Mart, etc.. In the Wacky world the hobby and retail boxes would often be very similar, having different box codes but only differing by the inclusion of a point-of-sale poster in the hobby box.
Blister pack - usually contains two or more packs in a plastic bubble or "blister", attached to a card that can hang on a store peg.
