A phrase used by computer geeks
meaning that a program is in the hands of the users
or is out on the Internet
being spread around. In this case the Internet
is "the wild."
The phrase is related to the concept of memes, because it connotes that the program spreads. Though not limited to them, it is often used in reference to computer viruses. An example can be found in the name of the WildList Organization (www.wildlist.org), a group dedicated to indexing knowledge about viruses that are in the wild.