jargon.artrocity.com
New Hacker's Dictionary the Jargon File v 4.4.6
[acronym, by analogy with FIFO (First In, First Out)] ‘First In, Still Here’. A joking way of pointing out that processing of a particular sequence of events or requests has stopped dead. Also FISH mode and FISHnet; the latter may be applied to any network that is running really slowly or exhibiting extreme flakiness.