In reply to Choss:
Alternatively, with a bit of a climbing theme (and I'm sure I've posted bits of this before, but it might have been quite a few years ago):
A
Almscliffe - Just overhanging enough to be annoying, while not overhanging enough to be spectacular. Hard on the arms, hence the name.
Anglezarke - The squawking noise made by leaders on falling off unexpectedly.
Applegarth - The space inside a helmet, useful for storing fruit, sandwiches and anything else one wishes to avoid having crushed while in transit to the crag.
Armathwaite - A reverse elbow-jam, usually accompanied by cursing (see Withnel)
Attermire - An area of soft muddy ground on a campsite, created by the farmer by the careful application of water and sheep droppings with the aim of trapping campers' cars so that he can then charge extra to drag them out with the tractor. A well-positioned attermire can almost double the campsite revenue, and is now stongly reccommended by bank managers.
Avon - What looks like a gear placement, but won't take anything on your rack despite half an hour of increasingly desperate faffing.
B
Baildon - Descriptive of the knackered state of the foam in a very used bouldering mat. "You need a new mat, mate - yours is well baildon."
Bamford - The loud fart emitted during extreme thrutching
Beachy Head - The appearance of someone who, having trained exclusively indoors for a year, comes out for two weeks in summer and forgets to put sunblock on his bald patch.
Birchen - The feeling of being happily knackered after a good day's climbing. "We did seventeen routes that day, and I was proper birchen by the time we hit the pub."
Bosigran - A leathery old lady soloing something improbable
Bosley Cloud - The brooding dark cloud which has been hanging around threatening rain all morning, and eventually produces torrential rain in mid-afternoon when everyone has become used to ignoring it.
Boulder Ruckle - A small collection of boulders leaning against each other with a space in the middle smelling strongly of urine.
Bowderstone - A loose rock lying around at the top which just fits nicely into the crack to create a bomber sling belay.
Brimham - The large and expanding gap behind a loose block, in which it is tempting but dangerous to place protection.
Burbage - To improvise in the face of disaster. "I had to burbage some prussik loops out of my shoelaces and the elastic off my pants"
C
Cadshaw - To get one's revenge on persistant sandbaggers by falling off on their gear.
Caley - The sudden rush of relief on topping out after Godrevy or Heeley
Callerhues - The thick black lines left on one's hands after lowering someone with a very dirty rope.
Carreg y Byg - The action of deciding not to do a route, consisting of a slow feel of the starting holds (the "carreg") followed by a thoughtful expression and a slow shake of the head (the "byg").
Chudleigh - The sinking feeling on realising that the vital piece of gear has been left at the bottom of the crag
Crafnant - a type of small semi-camming nut with a distinctive oval fish-piece and knurled wings. "There's a bomber Crafnant in that pocket"
Cratcliffe - A minor crag at the back of the guide that somehow never gets visited despite being the closest to home.
Crookrise - To cheat by using the big hole in the hold where the bolt goes as a one-finger pocket.
Cullernose - The persistant runny nose that comes with cold conditions.
Curbar - A full-body jam used in offwidths, usually accompanied by a fine selection of expletives. (See Withnel)
D
Denham - A very old guidebook, kept for sandbagging purposes.
Dewerstone - An enormous and slippery chockstone, climbed round by means of a surprisingly affectionate hugging manouvre
Doveholes - Slight scoops in the top of the crag, filled with water due to recent rain, in which one ends up kneeling while setting up the belay.
Dumbarton - the classic flat-on-back pratfall resulting from slick rock shoes on wet grass. See Hutaple.
E
Eastby - the classic navigational error in which the wrong end of the compass needle is lined up with the wrong place, the resultant bearing being 180 degrees out
Eavestone - An overhanging feature at just the right height and angle to act as a shelter in heavy rain.
Edgerton - The very long list of improbable things that the instructions forbid doing to one's gear. "Warning! Do not wash slings in battery acid!"
Eridge Green - A repellant shade of sludge green used for the manufacture of bouldering wear, actually designed to hide the grass stains from repeated contact with the ground but worn in the belief that it is a dramatic style statement.
F
Farleton - Technical name for the little spring that makes a friend open out.
Finedon - Theoretically climbable non-rock scenery, inserted in climbing guides as a practical joke by bored editors.
Folly Cove - Archaic term for the club madman - the sort of person who, being unable to belay due to a broken wrist and hence bored silly, sets off to solo an E4 one-handed despite only leading VS.
Froggatt - the small downward bounce just before the giant upward dyno
Frogsmouth - The gap in one's front teeth that results from falling off with a bight of rope in one¡¦s mouth.
G
Gaitkins - The useless but ornamental wrinkles moulded into the underside of a steep overhang at a climbing wall.
Gardoms - The three odd-sized nuts at the extreme end of the size range that never get used but still get taken up every route "just in case".
Giggleswick - Good-natured but useless second with a habit of laughing at his or her own incompetence which is at first entertaining but rapidly becomes wearisome.
Gillercombe - The pleasant coolness between the toes on removing rockshoes which have been worn all day.
Gimmer - A good resting hold/ledge from which one can contemplate the blank and unprotected climbing above.
Gimmerknowe - A lack of desire to leave a Gimmer.
Goatscrag - The chewy rubbery bits in dehydrated food, possibly goat or horse but more probably rat droppings.
Godrevy - The horrible sinking feeling on realising that it feels hard for VS because you had the guide upside-down and it is actually E2.
Gorple - To faff protractedly in the hope of getting out of an unwanted lead. "Mick kept going on about me doing Sunset Slab, so I gorpled until it started raining."
Great Wanney - one who lets loose rock and absent protection become an excuse for not doing the route "Gerron up it you great wanney!"
Guisecliff - An interesting but distracting little craglet encountered on the way to the main bit, the temptation to stop and play on it being almost overwhelming.
(Yes, there's more ... ::O)