- (postal) Initialism of international reply coupon.
- (intransitive, Internet, informal) To participate in Internet Relay Chat.
- 1995, Stuart Harris, The Irc Survival Guide:
- <Xantha> <- irced 2 yrs without aliases […]
- 2002, James Arnt Aune, Selling the Free Market:
- […] IRCing can confirm the observation that work and play appear to constitute a continuum for the digerati.
- 2004, Allison Rushby, Friday Night Cocktails:
- […] not that this is strange or anything, I do the same thing myself when I'm IRCing — there're some real weirdos out there roaming the Net […]