AFAIK
= A =
AFK
AFJ // n.
Written-only abbreviation for "April Fool's
Joke". Elaborate April Fool's hoaxes are a long-established
tradition on Usenet and Internet; see kremvax for an example.
In fact, April Fool's Day is the only seasonal holiday
consistently marked by customary observances on Internet and other
hacker networks.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.