IRC: /I-R-C/ n. [Internet Relay Chat] A worldwide "party line"
network that allows one to converse with others in real time. IRC
is structured as a network of Internet servers, each of which
accepts connections from client programs, one per user. The IRC
community and the Usenet and MUD communities overlap to some
extent, including both hackers and regular folks who have discovered
the wonders of computer networks. Some Usenet jargon has been
adopted on IRC, as have some conventions such as emoticons. There
is also a vigorous native jargon, represented in this lexicon by
entries marked `[IRC]'. See also talk mode.