I have seen a quote by Left Kreh stating "There's more BS in flyfishing than a Kansas City feedlot," and I agree. As a native of a place where the only hatch you could count on was mosquitos and boll weevils and idea of buying a chicken for its feathers were pretty foreign to most people, it has taken me a little while learn the meaning of most of the terms I see and hear, from fly fishermen and tyers. I think this discourages a lot of potential future flyfishermen & ladies and fly tyers.
I checked, there is a glossary of fishing terms in the archives, but they do not explain many, if any of the terms frequently used by fly fishermen and tyers. I think it would be useful to compile a glossary of terms and leave it as a sticky for ready reference to our members and passers-by.