Customizable Card Game is what the
game manufacturer Decipher calls some of its
card games. They could just as well have been called
Collectible Card Games, or
Trading Card Games, but Decipher wants to make
clear that the cards are
primarily meant for playing, not
collecting or
trading. The name is also
supposed to
indicate that there can be an
almost endless number of
different decks created, and that they can be
designed pretty much any way you want.
Of course the name is fairly stupid, but they want to be able to abbreviate it as CCG so that people immediately realize what it is. That people in general will assume that "CCG" means Collectible Card Game (as opposed to Customizable) is irrelevant, they will still be able understand what type of game it is.
At the moment Decipher has only two games that bear this title; Star Wars CCG and Star Trek CCG. (The other Decipher card games are either "Collectible" or "Trading".)