1. <hardware, cryptography> An integrated circuit which implements the SkipJack algorithm. The Clipper is manufactured by the US government to encrypt telephone data. It has the added feature that it can be decrypted by the US government, which has tried to make the chip compulsory in the United States. Phil Zimmerman (inventor of PGP) remarked, "This doesn't even pass the sniff test" (i.e. it stinks).