Ok ok, are you ready for a history lesson? Then I shall begin.
A long time ago, Arsenal were playing ManUre, and a picnic/coffee/snack event was set up between the two sets of supporters on Oxford Road (if you know Manchester at all) Arsenal lads got there first, this was going back to the days of "football specials" where trains went non stop from city to city without stopping, so they were about half an hour earlier than expected. The Arsenal lads had laid out their share of the spoils, and boredom set in. Tarquin decided he was too hungry, and piled into the cream cakes and was shovelling another into his mouth when the ManUre lads turned up. Someone said something along the lines of "Who's eaten all that" to which Tarquin replied "everything I eat" - There was a stand off for a few minutes, and somewhere in those few minutes, everything I eat was shortened to EIE, and it's stuck with the lads ever since as a lasting reminder of the day. As far as I'm aware, everything did get eaten, sandwiches et al.
The herd comes from those days mentioned of the football specials, and the way the OB herded the crowds from the train station into the pens (as they were known) As in herded like cattle, and believe me, we were!
I'm sure everyone knows the origin of "Gooner" and also the "ooh to be" chant.
There you go, no secret society. The only thing I can't tell you is the date at which EIE happened because I don't know myself, it's been around for as many years as I can remember, so probably mid to late 70's.
Please note that my comments are my own view, and not that of GoonersWorld. Everything I write is subject to © 2007-2013, and is my own work unless quoted otherwise.